HMIS RATINGS INSTRUCTION GUIDE, THIRD EDITION

Transcription

1 Table 2.5: Sample Rating Classification Data Sheet for HMIS Rating Classification Data Sheet This is a work sheet for generating HMIS ratings. This is not an MSDS. Rating prepared for: Ratings Assigned: Icons: Material NITROMETHANE Health [ / ] [ 1] Eyes/Skin/Respiratory Synonyms NITROCARBOL Flammability [ 3] Flammable CAS # Physical Hazards [ 3 ] Unstable Reactive Manufacturer PPE 26 Ratings prepared by: Company Preparer s Name Address Preparer s Title City/State/Zip I. Health 27 a. Chronic Hazard Properties (to determine whether the chronic hazard asterisk (*) is associated with the health rating) [ ] Carcinogen (> 0.1%) [ ]-IARC [ ]-NTP [ ]-OSHA [ ] Mutagen [ ] Teratogen [ ] Injury to specific organ from chronic overexposure (> 1%) [ ]-CNS [ ]-Lungs [ ]-Heart [ ]-Kidney [ ]-Eye [ ]-Hematopoietic [ ]-Liver [ ]-Reproductive System [ ]-Other Organ [ ] Other chronic effects b. Acute Toxic Properties (to determine numerical health rating) (i) Oral LD 50 (Rat) [ ] 0 > 5,000 mg/kg [X] 1 > 500 5,000 mg/kg [ ] 2 > mg/kg [ ] 3 >1 50 mg/kg [ ] 4 < 1 mg/kg [ ] Other oral toxicity information used (ii) Dermal LD 50 (Rabbit or Rat) [ ] 0 > 2,000 [ ] 1 > 1,000 2,000 mg/kg [ ] 2 > 200 1,000 mg/kg [ ] 3 > mg/kg [ ] 4 < 20 mg/kg [ ] Other dermal toxicity information used Classification Data II. Flammability 29 [ ] 0 Minimal Hazard: Materials that will not burn. This degree usually includes any material that will not burn in air when exposed to a temperature of 1500 F (815.5 C) for a period of 5 minutes. [ ] 1 Slight Hazard: Materials that must be preheated before ignition can occur. Materials in this degree require considerable preheating, under all ambient temperature conditions, before (iii) Inhalation LC 50 (4-hour exposure; Rat; for dusts, mists, fumes, gases, and vapors) [ ] 0 > 20 mg/l [ ] 1 > 2 20 mg/l [ ] 2 > mg/l [ ] 3 > mg/l [ ] 4 < 0.05 mg/l [X] Other inhalation toxicity information used 1-See MSDS (iv) Skin Irritation (4-hour exposure) [ ] 0 Essentially nonirritating; Draize/PII 28 =0 [X] 1 Slightly or mildly irritating; Draize/PII > 0 and < 5 [ ] 2 Moderately irritating; primary skin irritant or sensitizer; Draize/PII > 5 with no tissue destruction [ ] 3 Severely irritating; corrosive [ ] 4 (not to be used for skin) (v) Eye Irritation (4-hour exposure) [ ] 0 Essentially nonirritating; Draize = 0 [X] 1 Slightly or mildly irritating; reversible within 7 days; Draize > 0 and < 25 [ ] 2 Moderately to severely irritating; corneal involvement clearing in 8 21 days; Draize = [ ] 3 Corrosive; irreversible destruction; Draize > 80, effect irreversible in 21 days [ ] 4 (not to be used for eye) (vi) Other health considerations used in rating: Information used Rating III. Physical Hazard Water Reactive [ ] 0 Does not react with water. [ ] 1 Changes or decomposes on exposure to moisture. [ ] 2 May react violently with water. [ ] 3 May form explosive mixture with water. [ ] 4 React explosively with water without heat or confinement [X ] NA. 26 NPCA recommends that PPE codes be determined by the employer, who is familiar with the actual conditions under which chemicals in the facility are used. 27 Summarized Criteria. For health effects details, see Table 7.1b for the complete criteria. 28 PII = Primary Irritation Index. 29 Summarized Criteria. For flammability details, see Table 7.4 for the complete criteria. CHAPTER 2-53

2 ignition and combustion can occur. This degree usually includes: Materials that will burn in air when exposed to a temperature of 1500 F (815 C) for a period of 5 minutes or less Liquids, solids, and semisolids having a flash point above 200 F (93.3 C) (i.e., OSHA Class IIIB) Most ordinary combustible materials (e.g., wood pallets, plastic buckets, paper, wood). [ ] 2 Moderate Hazard: Materials that must be moderately heated or exposed to relatively high ambient temperatures before ignition can occur. Materials in this degree would not, under normal conditions, form hazardous atmospheres with air, but under high ambient temperatures or under moderate heating may release vapor in sufficient quantities to produce hazardous atmospheres with air. This degree usually includes: Liquids having a flash point at or above 100 F (37.8 C), but not exceeding 200 F (93.3 C) (i.e., OSHA Classes II and IIIA) Solid materials in the form of coarse dusts that may burn rapidly but that generally do not form explosive atmospheres Solid materials in a fibrous or shredded form that may burn rapidly and create flash fire hazards, such as cotton, sisal, and hemp Solids and semisolids (viscous and slow plowing as asphalt) that readily give off flammable vapors. [X] 3 Serious Hazard: Liquids and solids that can be ignited under almost all ambient temperature conditions. Materials in this degree produce hazardous atmospheres with air under almost all ambient temperatures, or, unaffected by ambient temperatures, are readily ignited under almost all conditions. This degree usually includes: Liquids having a flash point below 73 F (22.8 C) and having a boiling point at or above 100 F (37.8 C) and those liquids having a flash point at or above 73 F (22.8 C) and below 100 F (37.8 C) (i.e., OSHA Classes IB and IC); Materials that on account of their physical form or environmental conditions can form explosive mixtures with air and that are readily dispersed in air, such as dusts of combustible solids and mists of flammable or combustible liquid droplets Materials that burn with extreme rapidity, usually by reason of self-contained oxygen (e.g., dry nitrocellulose and many organic peroxides). [ ] 4 Severe Hazard: Materials that will rapidly or completely vaporize at atmospheric pressure and normal ambient temperature or that are readily dispersed in air, and that will burn readily. This degree usually includes: Flammable Gases Flammable Cryogenic Materials Any liquid or gaseous material that is liquid while under pressure and has a flash point below 73 F (22.8 C) and a boiling point below 100 F (37.8 C) (i.e., OSHA Class IA) Materials that ignite spontaneously when exposed to air at a temperature of 130 F (54.4 C) or below ( Pyrophoric ) Organic Peroxide [ ] 0 Normally stable. [ ] 1 Can become unstable at high temperatures and pressures, may react non-violently with water. [ ] 2 Normally unstable, readily undergoes violent chemical change, will not detonate, may react violently with water. [ ] 3 Capable of detonation or explosive reaction, require strong initiating source or heat under confinement, may react explosively with water. [ ] 4 Readily capable of detonation or explosive decomposition at normal temperature and pressure. [X ] NA. Explosives [ ] 0 Non-explosive. [ ] 1 Insensitive or does not have a mass explosive hazard. [ ] 2 Explosive effect confined to package and no projection of fragments of appreciable size or range expected. [ ] 3 Fire hazard and/or either a minor blast hazard or projection hazard, but does not have mass explosion hazard. [ ] 4 Has a mass explosion hazard or has projection hazard. [X ] NA. Compressed Gasses [ ] 1 Pressure below OSHA definition. [ ] 2 Pressurized and meet OSHA definition but < psi absolute at 70 F (21.1 C) [500 psig]. [ ] 3 Pressure > psi absolute at 70 F (21.1 C) [500 psig]. [X ] NA. Pyrophorics [ ] 1 No Rating. [ ] 2 No Rating. [ ] 3 No Rating. [ ] 4 Add to definition of Flammability 4. [X ] NA. Oxidizers [ ] 1 Packing Group III Solids, Packing Group I and II liquid. [ ] 2 Packing Group II Solids, Liquids exhibit mean pressure rise time (PRT) < the PRT of 1:1 nitric acid/cellulose mixture and criteria for Packing Group I are not met. [ ] 3 Packing Group I Solids, Liquids which spontaneously ignite when mixed with cellulose in 1:1 ratio or mean PRT < PRT of 1:1 perchloric acid/cellulose mixture. [X ] NA. Unstable Reactives [ ] 0 Will not polymerize, decompose, condense, or self react. [ ] 1 May decompose, condense, or self-react under conditions of high temperature and/or pressure, little or no potential for heat generation or explosion, readily undergo hazardous polymerization in the absence of inhibitors. [ ] 2 May decompose, condense, or self-react at ambient temperature and/or pressure, low potential for significant heat generation or explosion, readily form peroxides upon exposure to air or oxygen at room temperature. [X] 3 May decompose, condense, or self-react at ambient temperature and/or pressure, moderate potential (or risk) for significant heat generation or explosion. [ ] 4 May decompose, condense, or self-react at ambient temperature and/or pressure, high potential (or risk) for significant heat generation or explosion.. CHAPTER 2-54

3 2.1(F) White Phosphorus (CAS# ) PYROPHORIC (1) Health Data H: *4 Chronic: Early signs of chronic systemic intoxication by phosphorous are reported to include anemia, loss of appetite, gastrointestinal distress, chronic cough, a phosphorous garlic like odor of the breath, and pallor. A common response to severe chronic poisoning is necrosis of the mandible or maxilla (jawbone), known as Phossy Jaw." The first indications of "Phossy Jaw" are toothache and excessive salivation, followed by loosening of teeth, severe pain, and swelling of the jaw. Ulcerations can develop which may invade the bone. Acute: Dermal contact and inhalation are expected to be the primary routes of occupational exposure to phosphorous. Phosphorous can be absorbed through the skin, respiratory tract and gastrointestinal tract. Phosphorous ignites and burns spontaneously when exposed to air and the vapor produced is irritating to the eyes, nose, throat and lungs. The solid in contact with the skin or eyes produces severe burns. Phosphorous fume is an irritant to the respiratory tract and eyes. (2) Flammability Data: F:4 IGNITION TEMPERATURE: Ignites spontaneously on contact with air. Explosive when mixed with oxidizing materials. (3) Physical Hazard Data: PYROPHORIC PH:-F:4 Contents packed under water and will ignite if water is removed. Ignition temperature: Ignites spontaneously on contact with air. Explosive when mixed with oxidizing materials. See Table 2.6 for sample Rating Classification Data Sheet for this material. CHAPTER 2-55

4 CHAPTER 2-56

5 Table 2.6: Sample Rating Classification Data Sheet for HMIS Rating Classification Data Sheet This is a work sheet for generating HMIS ratings. This is not an MSDS. Rating prepared for: Ratings Assigned: Icons: Material WHITE PHOSPHORUS Health [*] [ 4 ] Skin/Respiratory Synonyms Flammability [ 4 ] Pyrophoric CAS # Physical Hazards [ -] Manufacturer PPE 30 Ratings prepared by: Company Preparer s Name Address Preparer s Title City/State/Zip I. Health 31 a. Chronic Hazard Properties (to determine whether the chronic hazard asterisk (*) is associated with the health rating) [ ] Carcinogen (> 0.1%) [ ]-IARC [ ]-NTP [ ]-OSHA [ ] Mutagen [ ] Teratogen [ ] Injury to specific organ from chronic overexposure (> 1%) [ ]-CNS [ ]-Lungs [ ]-Heart [ ]-Kidney [ ]-Eye [ ]-Hematopoietic [ ]-Liver [ ]-Reproductive System [ ]-Other Organ [X] Other chronic effects _Chronic Systemic Intoxication-4_ b. Acute Toxic Properties (to determine numerical health rating) (i) Oral LD 50 (Rat) [ ] 0 > 5,000 mg/kg [ ] 1 > 500 5,000 mg/kg [ ] 2 > mg/kg [ ] 3 >1 50 mg/kg [ ] 4 < 1 mg/kg [ ] Other oral toxicity information used (ii) Dermal LD 50 (Rabbit or Rat) [ ] 0 > 2,000 [ ] 1 > 1,000 2,000 mg/kg [ ] 2 > 200 1,000 mg/kg [ ] 3 > mg/kg [ ] 4 < 20 mg/kg [ ] Other dermal toxicity information used Classification Data II. Flammability 33 [ ] 0 Minimal Hazard: Materials that will not burn. This degree usually includes any material that will not burn in air when exposed to a temperature of 1500 F (815.5 C) for a period of 5 minutes. [ ] 1 Slight Hazard: Materials that must be preheated before ignition can occur. Materials in this degree require considerable (iii) Inhalation LC 50 (4-hour exposure; Rat; for dusts, mists, fumes, gases, and vapors) [ ] 0 > 20 mg/l [ ] 1 > 2 20 mg/l [ ] 2 > mg/l [ ] 3 > mg/l [ ] 4 < 0.05 mg/l [ ] Other inhalation toxicity information used (iv) Skin Irritation (4-hour exposure) [ ] 0 Essentially nonirritating; Draize/PII 32 =0 [ ] 1 Slightly or mildly irritating; Draize/PII > 0 and < 5 [ ] 2 Moderately irritating; primary skin irritant or sensitizer; Draize/PII > 5 with no tissue destruction [ ] 3 Severely irritating; corrosive [ ] 4 (not to be used for skin) (v) Eye Irritation (4-hour exposure) [ ] 0 Essentially nonirritating; Draize = 0 [ ] 1 Slightly or mildly irritating; reversible within 7 days; Draize > 0 and < 25 [ ] 2 Moderately to severely irritating; corneal involvement clearing in 8 21 days; Draize = [ ] 3 Corrosive; irreversible destruction; Draize > 80, effect irreversible in 21 days [ ] 4 (not to be used for eye) (vi) Other health considerations used in rating: Information used See MSDS for Toxic Effects Rating 4 III. Physical Hazard Water Reactive [ ] 0 Does not react with water. [ ] 1 Changes or decomposes on exposure to moisture. [ ] 2 May react violently with water. [ ] 3 May form explosive mixture with water. [ ] 4 React explosively with water without heat or confinement 30 NPCA recommends that PPE codes be determined by the employer, who is familiar with the actual conditions under which chemicals in the facility are used. 31 Summarized Criteria. For health effects details, see Table 7.1b for the complete criteria. 32 PII = Primary Irritation Index. 33 Summarized Criteria. For flammability details, see Table 7.4 for the complete criteria. CHAPTER 2-57

6 preheating, under all ambient temperature conditions, before ignition and combustion can occur. This degree usually includes: Materials that will burn in air when exposed to a temperature of 1500 F (815 C) for a period of 5 minutes or less Liquids, solids, and semisolids having a flash point above 200 F (93.3 C) (i.e., OSHA Class IIIB) Most ordinary combustible materials (e.g., wood pallets, plastic buckets, paper, wood). [ ] 2 Moderate Hazard: Materials that must be moderately heated or exposed to relatively high ambient temperatures before ignition can occur. Materials in this degree would not, under normal conditions, form hazardous atmospheres with air, but under high ambient temperatures or under moderate heating may release vapor in sufficient quantities to produce hazardous atmospheres with air. This degree usually includes: Liquids having a flash point at or above 100 F (37.8 C), but not exceeding 200 F (93.3 C) (i.e., OSHA Classes II and IIIA) Solid materials in the form of coarse dusts that may burn rapidly but that generally do not form explosive atmospheres Solid materials in a fibrous or shredded form that may burn rapidly and create flash fire hazards, such as cotton, sisal, and hemp Solids and semisolids (viscous and slow plowing as asphalt) that readily give off flammable vapors. [ ] 3 Serious Hazard: Liquids and solids that can be ignited under almost all ambient temperature conditions. Materials in this degree produce hazardous atmospheres with air under almost all ambient temperatures, or, unaffected by ambient temperatures, are readily ignited under almost all conditions. This degree usually includes: Liquids having a flash point below 73 F (22.8 C) and having a boiling point at or above 100 F (37.8 C) and those liquids having a flash point at or above 73 F (22.8 C) and below 100 F (37.8 C) (i.e., OSHA Classes IB and IC); Materials that on account of their physical form or environmental conditions can form explosive mixtures with air and that are readily dispersed in air, such as dusts of combustible solids and mists of flammable or combustible liquid droplets Materials that burn with extreme rapidity, usually by reason of self-contained oxygen (e.g., dry nitrocellulose and many organic peroxides). [X] 4 Severe Hazard: Materials that will rapidly or completely vaporize at atmospheric pressure and normal ambient temperature or that are readily dispersed in air, and that will burn readily. This degree usually includes: Flammable Gases Flammable Cryogenic Materials Any liquid or gaseous material that is liquid while under pressure and has a flash point below 73 F (22.8 C) and a boiling point below 100 F (37.8 C) (i.e., OSHA Class IA) Materials that ignite spontaneously when exposed to air at a temperature of 130 F (54.4 C) or below ( Pyrophoric ) Organic Peroxide [ ] 0 Normally stable. [ ] 1 Can become unstable at high temperatures and pressures, may react non-violently with water. [ ] 2 Normally unstable, readily undergoes violent chemical change, will not detonate, may react violently with water. [ ] 3 Capable of detonation or explosive reaction, require strong initiating source or heat under confinement, may react explosively with water. [ ] 4 Readily capable of detonation or explosive decomposition at normal temperature and pressure. Explosives [ ] 0 Non-explosive. [ ] 1 Insensitive or does not have a mass explosive hazard. [ ] 2 Explosive effect confined to package and no projection of fragments of appreciable size or range expected. [ ] 3 Fire hazard and/or either a minor blast hazard or projection hazard, but does not have mass explosion hazard. [ ] 4 Has a mass explosion hazard or has projection hazard. Compressed Gasses [ ] 1 Pressure below OSHA definition. [ ] 2 Pressurized and meet OSHA definition but < psi absolute at 70 F (21.1 C) [500 psig]. [ ] 3 Pressure > psi absolute at 70 F (21.1 C) [500 psig]. Pyrophorics [ ] 1 No Rating. [ ] 2 No Rating. [ ] 3 No Rating. [X] 4 Add to definition of Flammability 4.. Oxidizers [ ] 1 Packing Group III Solids, Packing Group I and II liquid. [ ] 2 Packing Group II Solids, Liquids exhibit mean pressure rise time (PRT) < the PRT of 1:1 nitric acid/cellulose mixture and criteria for Packing Group I are not met. [ ] 3 Packing Group I Solids, Liquids which spontaneously ignite when mixed with cellulose in 1:1 ratio or mean PRT < PRT of 1:1 perchloric acid/cellulose mixture. Unstable Reactives [ ] 0 Will not polymerize, decompose, condense, or self react. [ ] 1 May decompose, condense, or self-react under conditions of high temperature and/or pressure, little or no potential for heat generation or explosion, readily undergo hazardous polymerization in the absence of inhibitors. [ ] 2 May decompose, condense, or self-react at ambient temperature and/or pressure, low potential for significant heat generation or explosion, readily form peroxides upon exposure to air or oxygen at room temperature. [ ] 3 May decompose, condense, or self-react at ambient temperature and/or pressure, moderate potential (or risk) for significant heat generation or explosion. [ ] 4 May decompose, condense, or self-react at ambient temperature and/or pressure, high potential (or risk) for significant heat generation or explosion. CHAPTER 2-58

7 2.1(G) Sodium (CAS# ) WATER REACTIVE (1) Health Data H:3 Chronic: None Acute: POTENTIAL HEALTH EFFECTS Causes severe eye and skin burns from reactions to sodium hydroxide effects may be permanent. Fumes from sodium reactions to sodium oxide may irritate the nose, throat, and lungs. Ingestion will cause burns of the gastrointestinal tract with perforations by formation of sodium hydroxide. Sodium reacts rapidly with moisture in air or tissues to form sodium hydroxide and sodium oxide. Effects following inhalation, ingestion, or skin or eye contact result from direct chemical reaction with tissue and from thermal reaction with water. Overexposure by skin or eye contact include skin burns or ulceration, or eye corrosion with corneal or conjunctival ulceration. By inhalation, the effects include irritation of the upper respiratory passages with coughing and discomfort. By ingestion, the effects include abdominal discomfort characterized by nausea, severe pain, diarrhea, and collapse. (2) Flammability Data: F:3 FLAMMABLE SOLID, FIRE AND EXPLOSION HAZARDS: Reacts violently with water releasing hydrogen gas, which will ignite and explode in air. Burning produces dense, white, irritating smoke. (3) Physical Hazard Data: WATER REACTIVE PH:4 FIRE AND EXPLOSION HAZARDS: Reacts violently with water releasing hydrogen gas, which will ignite and explode in air. Burning produces dense, white, irritating smoke. See Table 2.7 for sample Rating Classification Data Sheet for this material. CHAPTER 2-59

8 CHAPTER 2-60

9 Table 2.7: Sample Rating Classification Data Sheet for HMIS Rating Classification Data Sheet This is a work sheet for generating HMIS ratings. This is not an MSDS. Rating prepared for: Ratings Assigned: Icons: Material SODIUM Health [ / ] [ 3 ] Eyes/Skin/Respiratory Synonyms NIAPURE Flammability [ 3 ] Flammable CAS # Physical Hazards [ 4 ] Water Reactive Manufacturer PPE 34 Ratings prepared by: Company Preparer s Name Address Preparer s Title City/State/Zip I. Health 35 a. Chronic Hazard Properties (to determine whether the chronic hazard asterisk (*) is associated with the health rating) [ ] Carcinogen (> 0.1%) [ ]-IARC [ ]-NTP [ ]-OSHA [ ] Mutagen [ ] Teratogen [ ] Injury to specific organ from chronic overexposure (> 1%) [ ]-CNS [ ]-Lungs [ ]-Heart [ ]-Kidney [ ]-Eye [ ]-Hematopoietic [ ]-Liver [ ]-Reproductive System [ ]-Other Organ [ ] Other chronic effects b. Acute Toxic Properties (to determine numerical health rating) (i) Oral LD 50 (Rat) [ ] 0 > 5,000 mg/kg [ ] 1 > 500 5,000 mg/kg [ ] 2 > mg/kg [ ] 3 >1 50 mg/kg [ ] 4 < 1 mg/kg [ ] Other oral toxicity information used (ii) Dermal LD 50 (Rabbit or Rat) [ ] 0 > 2,000 [ ] 1 > 1,000 2,000 mg/kg [ ] 2 > 200 1,000 mg/kg [ ] 3 > mg/kg [ ] 4 < 20 mg/kg [ ] Other dermal toxicity information used Classification Data II. Flammability 37 [ ] 0 Minimal Hazard: Materials that will not burn. This degree usually includes any material that will not burn in air when exposed to a temperature of 1500 F (815.5 C) for a period of 5 minutes. [ ] 1 Slight Hazard: Materials that must be preheated before ignition can occur. Materials in this degree require considerable preheating, under all ambient temperature conditions, before (iii) Inhalation LC 50 (4-hour exposure; Rat; for dusts, mists, fumes, gases, and vapors) [ ] 0 > 20 mg/l [ ] 1 > 2 20 mg/l [ ] 2 > mg/l [ ] 3 > mg/l [ ] 4 < 0.05 mg/l [X ] _3 Other inhalation toxicity information used See MSDS (iv) Skin Irritation (4-hour exposure) [ ] 0 Essentially nonirritating; Draize/PII 36 =0 [ ] 1 Slightly or mildly irritating; Draize/PII > 0 and < 5 [ ] 2 Moderately irritating; primary skin irritant or sensitizer; Draize/PII > 5 with no tissue destruction [X] 3 Severely irritating; corrosive [ ] 4 (not to be used for skin) (v) Eye Irritation (4-hour exposure) [ ] 0 Essentially nonirritating; Draize = 0 [ ] 1 Slightly or mildly irritating; reversible within 7 days; Draize > 0 and < 25 [ ] 2 Moderately to severely irritating; corneal involvement clearing in 8 21 days; Draize = [X] 3 Corrosive; irreversible destruction; Draize > 80, effect irreversible in 21 days [ ] 4 (not to be used for eye) (vi) Other health considerations used in rating: Information used Rating III. Physical Hazard Water Reactive [ ] 0 Does not react with water. [ ] 1 Changes or decomposes on exposure to moisture. [ ] 2 May react violently with water. [ ] 3 May form explosive mixture with water. [X] 4 React explosively with water without heat or confinement. 34 NPCA recommends that PPE codes be determined by the employer, who is familiar with the actual conditions under which chemicals in the facility are used. 35 Summarized Criteria. For health effects details, see Table 7.1b for the complete criteria. 36 PII = Primary Irritation Index. 37 Summarized Criteria. For flammability details, see Table 7.4 for the complete criteria. CHAPTER 2-61

10 ignition and combustion can occur. This degree usually includes: Materials that will burn in air when exposed to a temperature of 1500 F (815 C) for a period of 5 minutes or less Liquids, solids, and semisolids having a flash point above 200 F (93.3 C) (i.e., OSHA Class IIIB) Most ordinary combustible materials (e.g., wood pallets, plastic buckets, paper, wood). [ ] 2 Moderate Hazard: Materials that must be moderately heated or exposed to relatively high ambient temperatures before ignition can occur. Materials in this degree would not, under normal conditions, form hazardous atmospheres with air, but under high ambient temperatures or under moderate heating may release vapor in sufficient quantities to produce hazardous atmospheres with air. This degree usually includes: Liquids having a flash point at or above 100 F (37.8 C), but not exceeding 200 F (93.3 C) (i.e., OSHA Classes II and IIIA) Solid materials in the form of coarse dusts that may burn rapidly but that generally do not form explosive atmospheres Solid materials in a fibrous or shredded form that may burn rapidly and create flash fire hazards, such as cotton, sisal, and hemp Solids and semisolids (viscous and slow plowing as asphalt) that readily give off flammable vapors. [X] 3 Serious Hazard: Liquids and solids that can be ignited under almost all ambient temperature conditions. Materials in this degree produce hazardous atmospheres with air under almost all ambient temperatures, or, unaffected by ambient temperatures, are readily ignited under almost all conditions. This degree usually includes: Liquids having a flash point below 73 F (22.8 C) and having a boiling point at or above 100 F (37.8 C) and those liquids having a flash point at or above 73 F (22.8 C) and below 100 F (37.8 C) (i.e., OSHA Classes IB and IC); Materials that on account of their physical form or environmental conditions can form explosive mixtures with air and that are readily dispersed in air, such as dusts of combustible solids and mists of flammable or combustible liquid droplets Materials that burn with extreme rapidity, usually by reason of self-contained oxygen (e.g., dry nitrocellulose and many organic peroxides). [ ] 4 Severe Hazard: Materials that will rapidly or completely vaporize at atmospheric pressure and normal ambient temperature or that are readily dispersed in air, and that will burn readily. This degree usually includes: Flammable Gases Flammable Cryogenic Materials Any liquid or gaseous material that is liquid while under pressure and has a flash point below 73 F (22.8 C) and a boiling point below 100 F (37.8 C) (i.e., OSHA Class IA) Materials that ignite spontaneously when exposed to air at a temperature of 130 F (54.4 C) or below ( Pyrophoric ) Organic Peroxide [ ] 0 Normally stable. [ ] 1 Can become unstable at high temperatures and pressures, may react non-violently with water. [ ] 2 Normally unstable, readily undergoes violent chemical change, will not detonate, may react violently with water. [ ] 3 Capable of detonation or explosive reaction, require strong initiating source or heat under confinement, may react explosively with water. [ ] 4 Readily capable of detonation or explosive decomposition at normal temperature and pressure. Explosives [ ] 0 Non-explosive. [ ] 1 Insensitive or does not have a mass explosive hazard. [ ] 2 Explosive effect confined to package and no projection of fragments of appreciable size or range expected. [ ] 3 Fire hazard and/or either a minor blast hazard or projection hazard, but does not have mass explosion hazard. [ ] 4 Has a mass explosion hazard or has projection hazard. Compressed Gasses [ ] 1 Pressure below OSHA definition. [ ] 2 Pressurized and meet OSHA definition but < psi absolute at 70 F (21.1 C) [500 psig]. [ ] 3 Pressure > psi absolute at 70 F (21.1 C) [500 psig]. Pyrophorics [ ] 1 No Rating. [ ] 2 No Rating. [ ] 3 No Rating. [ ] 4 Add to definition of Flammability 4. Oxidizers [ ] 1 Packing Group III Solids, Packing Group I and II liquid. [ ] 2 Packing Group II Solids, Liquids exhibit mean pressure rise time (PRT) < the PRT of 1:1 nitric acid/cellulose mixture and criteria for Packing Group I are not met. [ ] 3 Packing Group I Solids, Liquids which spontaneously ignite when mixed with cellulose in 1:1 ratio or mean PRT < PRT of 1:1 perchloric acid/cellulose mixture. Unstable Reactives [ ] 0 Will not polymerize, decompose, condense, or self react. [ ] 1 May decompose, condense, or self-react under conditions of high temperature and/or pressure, little or no potential for heat generation or explosion, readily undergo hazardous polymerization in the absence of inhibitors. [ ] 2 May decompose, condense, or self-react at ambient temperature and/or pressure, low potential for significant heat generation or explosion, readily form peroxides upon exposure to air or oxygen at room temperature. [ ] 3 May decompose, condense, or self-react at ambient temperature and/or pressure, moderate potential (or risk) for significant heat generation or explosion. [ ] 4 May decompose, condense, or self-react at ambient temperature and/or pressure, high potential (or risk) for significant heat generation or explosion. CHAPTER 2-62

11 2.1(H) Sodium Hydride (CAS# ) WATER REACTIVE (1) Health Data H:3 Chronic: NONE Acute: PRIMARY ROUTES OF EXPOSURE: EYE, SKIN, INHALATION (BREATHING). EYE CONTACT: Causes severe burns and permanent eye damage. Can cause burning sensation, tearing, and redness. SKIN CONTACT: Causes burns. Can cause redness, itching, and burning sensation. INHALATION (BREATHING): Severely irritating to the eyes, nose, and respiratory tract. INGESTION (SWALLOWING): Causes severe burns to the mouth, throat, and stomach. May cause nausea, vomiting, pain, and stomach upset (e.g. diarrhea) (2) Flammability Data: F:3 FLAMMABLE SOLID: Reacts with water or moisture to liberate flammable hydrogen gas. During a fire, irritating and highly toxic gases may be generated during combustion or decomposition. (3) Physical Hazard Data: WATER REACTIVE PH:4 Reacts with water or moisture to liberate flammable hydrogen gas. During a fire, irritating and highly toxic gases may be generated during combustion or decomposition. See Table 2.8 for sample Rating Classification Data Sheet for this material. CHAPTER 2-63

12 CHAPTER 2-64

13 Table 2.8: Sample Rating Classification Data Sheet for HMIS Rating Classification Data Sheet This is a work sheet for generating HMIS ratings. This is not an MSDS. Rating prepared for: Ratings Assigned: Icons: Material SODIUM HYDRIDE Health [ / ] [ 3 ] Eyes/Skin/Respiratory Synonyms Flammability [ 3 ] Flammable CAS # Physical Hazards [ 4 ] Water Reactive Manufacturer PPE 38 Ratings prepared by: Company Preparer s Name Address Preparer s Title City/State/Zip I. Health 39 a. Chronic Hazard Properties (to determine whether the chronic hazard asterisk (*) is associated with the health rating) [ ] Carcinogen (> 0.1%) [ ]-IARC [ ]-NTP [ ]-OSHA [ ] Mutagen [ ] Teratogen [ ] Injury to specific organ from chronic overexposure (> 1%) [ ]-CNS [ ]-Lungs [ ]-Heart [ ]-Kidney [ ]-Eye [ ]-Hematopoietic [ ]-Liver [ ]-Reproductive System [ ]-Other Organ [ ] Other chronic effects b. Acute Toxic Properties (to determine numerical health rating) (i) Oral LD 50 (Rat) [ ] 0 > 5,000 mg/kg [ ] 1 > 500 5,000 mg/kg [ ] 2 > mg/kg [ ] 3 >1 50 mg/kg [ ] 4 < 1 mg/kg [ ] Other oral toxicity information used (ii) Dermal LD 50 (Rabbit or Rat) [ ] 0 > 2,000 [ ] 1 > 1,000 2,000 mg/kg [ ] 2 > 200 1,000 mg/kg [ ] 3 > mg/kg [ ] 4 < 20 mg/kg [ ] Other dermal toxicity information used Classification Data II. Flammability 41 [ ] 0 Minimal Hazard: Materials that will not burn. This degree usually includes any material that will not burn in air when exposed to a temperature of 1500 F (815.5 C) for a period of 5 minutes. [ ] 1 Slight Hazard: Materials that must be preheated before ignition can occur. Materials in this degree require considerable preheating, under all ambient temperature conditions, before (iii) Inhalation LC 50 (4-hour exposure; Rat; for dusts, mists, fumes, gases, and vapors) [ ] 0 > 20 mg/l [ ] 1 > 2 20 mg/l [ ] 2 > mg/l [ ] 3 > mg/l [ ] 4 < 0.05 mg/l [ ] _3 Other inhalation toxicity information used See MSDS for Details (iv) Skin Irritation (4-hour exposure) [ ] 0 Essentially nonirritating; Draize/PII 40 =0 [ ] 1 Slightly or mildly irritating; Draize/PII > 0 and < 5 [ ] 2 Moderately irritating; primary skin irritant or sensitizer; Draize/PII > 5 with no tissue destruction [X] 3 Severely irritating; corrosive [ ] 4 (not to be used for skin) (v) Eye Irritation (4-hour exposure) [ ] 0 Essentially nonirritating; Draize = 0 [ ] 1 Slightly or mildly irritating; reversible within 7 days; Draize > 0 and < 25 [ ] 2 Moderately to severely irritating; corneal involvement clearing in 8 21 days; Draize = [X] 3 Corrosive; irreversible destruction; Draize > 80, effect irreversible in 21 days [ ] 4 (not to be used for eye) (vi) Other health considerations used in rating: Information used Rating III. Physical Hazard Water Reactive [ ] 0 Does not react with water. [ ] 1 Changes or decomposes on exposure to moisture. [ ] 2 May react violently with water. [ ] 3 May form explosive mixture with water. [X] 4 React explosively with water without heat or confinement. 38 NPCA recommends that PPE codes be determined by the employer, who is familiar with the actual conditions under which chemicals in the facility are used. 39 Summarized Criteria. For health effects details, see Table 7.1b for the complete criteria. 40 PII = Primary Irritation Index. 41 Summarized Criteria. For flammability details, see Table 7.4 for the complete criteria. CHAPTER 2-65

14 ignition and combustion can occur. This degree usually includes: Materials that will burn in air when exposed to a temperature of 1500 F (815 C) for a period of 5 minutes or less Liquids, solids, and semisolids having a flash point above 200 F (93.3 C) (i.e., OSHA Class IIIB) Most ordinary combustible materials (e.g., wood pallets, plastic buckets, paper, wood). [ ] 2 Moderate Hazard: Materials that must be moderately heated or exposed to relatively high ambient temperatures before ignition can occur. Materials in this degree would not, under normal conditions, form hazardous atmospheres with air, but under high ambient temperatures or under moderate heating may release vapor in sufficient quantities to produce hazardous atmospheres with air. This degree usually includes: Liquids having a flash point at or above 100 F (37.8 C), but not exceeding 200 F (93.3 C) (i.e., OSHA Classes II and IIIA) Solid materials in the form of coarse dusts that may burn rapidly but that generally do not form explosive atmospheres Solid materials in a fibrous or shredded form that may burn rapidly and create flash fire hazards, such as cotton, sisal, and hemp Solids and semisolids (viscous and slow plowing as asphalt) that readily give off flammable vapors. [X] 3 Serious Hazard: Liquids and solids that can be ignited under almost all ambient temperature conditions. Materials in this degree produce hazardous atmospheres with air under almost all ambient temperatures, or, unaffected by ambient temperatures, are readily ignited under almost all conditions. This degree usually includes: Liquids having a flash point below 73 F (22.8 C) and having a boiling point at or above 100 F (37.8 C) and those liquids having a flash point at or above 73 F (22.8 C) and below 100 F (37.8 C) (i.e., OSHA Classes IB and IC); Materials that on account of their physical form or environmental conditions can form explosive mixtures with air and that are readily dispersed in air, such as dusts of combustible solids and mists of flammable or combustible liquid droplets Materials that burn with extreme rapidity, usually by reason of self-contained oxygen (e.g., dry nitrocellulose and many organic peroxides). [ ] 4 Severe Hazard: Materials that will rapidly or completely vaporize at atmospheric pressure and normal ambient temperature or that are readily dispersed in air, and that will burn readily. This degree usually includes: Flammable Gases Flammable Cryogenic Materials Any liquid or gaseous material that is liquid while under pressure and has a flash point below 73 F (22.8 C) and a boiling point below 100 F (37.8 C) (i.e., OSHA Class IA) Materials that ignite spontaneously when exposed to air at a temperature of 130 F (54.4 C) or below ( Pyrophoric ) Organic Peroxide [ ] 0 Normally stable. [ ] 1 Can become unstable at high temperatures and pressures, may react non-violently with water. [ ] 2 Normally unstable, readily undergoes violent chemical change, will not detonate, may react violently with water. [ ] 3 Capable of detonation or explosive reaction, require strong initiating source or heat under confinement, may react explosively with water. [ ] 4 Readily capable of detonation or explosive decomposition at normal temperature and pressure. Explosives [ ] 0 Non-explosive. [ ] 1 Insensitive or does not have a mass explosive hazard. [ ] 2 Explosive effect confined to package and no projection of fragments of appreciable size or range expected. [ ] 3 Fire hazard and/or either a minor blast hazard or projection hazard, but does not have mass explosion hazard. [ ] 4 Has a mass explosion hazard or has projection hazard. Compressed Gasses [ ] 1 Pressure below OSHA definition. [ ] 2 Pressurized and meet OSHA definition but < psi absolute at 70 F (21.1 C) [500 psig]. [ ] 3 Pressure > psi absolute at 70 F (21.1 C) [500 psig]. Pyrophorics [ ] 1 No Rating. [ ] 2 No Rating. [ ] 3 No Rating. [ ] 4 Add to definition of Flammability 4. Oxidizers [ ] 1 Packing Group III Solids, Packing Group I and II liquid. [ ] 2 Packing Group II Solids, Liquids exhibit mean pressure rise time (PRT) < the PRT of 1:1 nitric acid/cellulose mixture and criteria for Packing Group I are not met. [ ] 3 Packing Group I Solids, Liquids which spontaneously ignite when mixed with cellulose in 1:1 ratio or mean PRT < PRT of 1:1 perchloric acid/cellulose mixture. Unstable Reactives [ ] 0 Will not polymerize, decompose, condense, or self react. [ ] 1 May decompose, condense, or self-react under conditions of high temperature and/or pressure, little or no potential for heat generation or explosion, readily undergo hazardous polymerization in the absence of inhibitors. [ ] 2 May decompose, condense, or self-react at ambient temperature and/or pressure, low potential for significant heat generation or explosion, readily form peroxides upon exposure to air or oxygen at room temperature. [ ] 3 May decompose, condense, or self-react at ambient temperature and/or pressure, moderate potential (or risk) for significant heat generation or explosion. [ ] 4 May decompose, condense, or self-react at ambient temperature and/or pressure, high potential (or risk) for significant heat generation or explosion. CHAPTER 2-66

15 2.1(I) Styrene (CAS# ) UNSTABLE REACTIVE (1) Health Data H: *1 Chronic: CARCINOGENICITY: Can cause cancer in laboratory animal, but the available information is inadequate to determine of this material can cause cancer in humans: IARC GROUP 2B. TARGET ORGANS: Repeated inhalation of this material at concentrations above the recommended exposure limit may cause damage to the following organ(s) based on animal data: > LIVER < Acute: EYE: Not expected to cause prolonged or significant eye irritation. SKIN: Contact with the skin causes irritation. Contact with the skin is not expected to cause an allergic skin response. Skin contact may cause drying or defatting of the skin. INGESTION: Because of its low viscosity, this material can directly enter the lungs, if swallowed, or if subsequently vomited, once in the lungs it is very difficult to remove and can cause severe injury or death. INHALATION: The vapor or fumes from this material may cause respiratory irritation. Breathing this material at concentrations above the recommended exposure limit may cause central nervous system effects. (2) Flammability Data: F:3 FLASH POINT: (CC) > 88F (> 3C) This material presents a fire hazard. Liquid evaporates quickly and forms vapor (fumes) which can catch fire and burn with explosive force. (3) Physical Hazard Data: UNSTABLE REACTIVE PH:1 INCOMPATIBILITY WITH OTHER MATERIALS: May react with strong oxidizing agents, such as chlorates, nitrates, peroxides, etc. Corrosive to copper and copper bearing alloys. HAZARDOUS POLYMERIZATION: Decreased or no inhibitor content will lead to rapid polymerization. DOT SHIPPING NAME: DOT HAZARD CLASS: DOT PACKING GROUP: STYRENE MONOMER, INHIBITED 3 (FLAMMABLE LIQUID) III See Table 2.9 for sample Rating Classification Data Sheet for this material. CHAPTER 2-67

16 CHAPTER 2-68

17 Table 2.9: Sample Rating Classification Data Sheet for HMIS Rating Classification Data Sheet This is a work sheet for generating HMIS ratings. This is not an MSDS. Rating prepared for: Ratings Assigned: Icons: Material STYRENE Health [*] [ 1 ] Eyes/Skin/Respiratory Synonyms Flammability [ 3 ] Flammable CAS # Physical Hazards [ 1 ] Unstable Reactive Manufacturer PPE 42 Ratings prepared by: Company Preparer s Name Address Preparer s Title City/State/Zip I. Health 43 a. Chronic Hazard Properties (to determine whether the chronic hazard asterisk (*) is associated with the health rating) [X] Carcinogen (> 0.1%) [X]-IARC [ ]-NTP [ ]-OSHA Group 2B [ ] Mutagen [ ] Teratogen [X] Injury to specific organ from chronic overexposure (> 1%) [ ]-CNS [ ]-Lungs [ ]-Heart [ ]-Kidney [ ]-Eye [ ]-Hematopoietic [X]-Liver [ ]-Reproductive System [ ]-Other Organ [ ] Other chronic effects b. Acute Toxic Properties (to determine numerical health rating) (i) Oral LD 50 (Rat) [ ] 0 > 5,000 mg/kg [ ] 1 > 500 5,000 mg/kg [ ] 2 > mg/kg [ ] 3 >1 50 mg/kg [ ] 4 < 1 mg/kg [ ] Other oral toxicity information used (ii) Dermal LD 50 (Rabbit or Rat) [ ] 0 > 2,000 [ ] 1 > 1,000 2,000 mg/kg [ ] 2 > 200 1,000 mg/kg [ ] 3 > mg/kg [ ] 4 < 20 mg/kg [ ] Other dermal toxicity information used Classification Data II. Flammability 45 [ ] 0 Minimal Hazard: Materials that will not burn. This degree usually includes any material that will not burn in air when exposed to a temperature of 1500 F (815.5 C) for a period of 5 minutes. [ ] 1 Slight Hazard: Materials that must be preheated before ignition can occur. Materials in this degree require considerable (iii) Inhalation LC 50 (4-hour exposure; Rat; for dusts, mists, fumes, gases, and vapors) [ ] 0 > 20 mg/l [ ] 1 > 2 20 mg/l [ ] 2 > mg/l [ ] 3 > mg/l [ ] 4 < 0.05 mg/l [X] _1 Other inhalation toxicity information used Respiratory Irritant (iv) Skin Irritation (4-hour exposure) [ ] 0 Essentially nonirritating; Draize/PII 44 =0 [X] 1 Slightly or mildly irritating; Draize/PII > 0 and < 5 [ ] 2 Moderately irritating; primary skin irritant or sensitizer; Draize/PII > 5 with no tissue destruction [ ] 3 Severely irritating; corrosive [ ] 4 (not to be used for skin) (v) Eye Irritation (4-hour exposure) [ ] 0 Essentially nonirritating; Draize = 0 [X] 1 Slightly or mildly irritating; reversible within 7 days; Draize > 0 and < 25 [ ] 2 Moderately to severely irritating; corneal involvement clearing in 8 21 days; Draize = [ ] 3 Corrosive; irreversible destruction; Draize > 80, effect irreversible in 21 days [ ] 4 (not to be used for eye) (vi) Other health considerations used in rating: Information used Ingestion-See MSDS Rating 1 III. Physical Hazard Water Reactive [ ] 0 Does not react with water. [ ] 1 Changes or decomposes on exposure to moisture. [ ] 2 May react violently with water. [ ] 3 May form explosive mixture with water. [ ] 4 React explosively with water without heat or confinement 42 NPCA recommends that PPE codes be determined by the employer, who is familiar with the actual conditions under which chemicals in the facility are used. 43 Summarized Criteria. For health effects details, see Table 7.1b for the complete criteria. 44 PII = Primary Irritation Index. 45 Summarized Criteria. For flammability details, see Table 7.4 for the complete criteria. CHAPTER 2-69

18 preheating, under all ambient temperature conditions, before ignition and combustion can occur. This degree usually includes: Materials that will burn in air when exposed to a temperature of 1500 F (815 C) for a period of 5 minutes or less Liquids, solids, and semisolids having a flash point above 200 F (93.3 C) (i.e., OSHA Class IIIB) Most ordinary combustible materials (e.g., wood pallets, plastic buckets, paper, wood). [ ] 2 Moderate Hazard: Materials that must be moderately heated or exposed to relatively high ambient temperatures before ignition can occur. Materials in this degree would not, under normal conditions, form hazardous atmospheres with air, but under high ambient temperatures or under moderate heating may release vapor in sufficient quantities to produce hazardous atmospheres with air. This degree usually includes: Liquids having a flash point at or above 100 F (37.8 C), but not exceeding 200 F (93.3 C) (i.e., OSHA Classes II and IIIA) Solid materials in the form of coarse dusts that may burn rapidly but that generally do not form explosive atmospheres Solid materials in a fibrous or shredded form that may burn rapidly and create flash fire hazards, such as cotton, sisal, and hemp Solids and semisolids (viscous and slow plowing as asphalt) that readily give off flammable vapors. [X] 3 Serious Hazard: Liquids and solids that can be ignited under almost all ambient temperature conditions. Materials in this degree produce hazardous atmospheres with air under almost all ambient temperatures, or, unaffected by ambient temperatures, are readily ignited under almost all conditions. This degree usually includes: Liquids having a flash point below 73 F (22.8 C) and having a boiling point at or above 100 F (37.8 C) and those liquids having a flash point at or above 73 F (22.8 C) and below 100 F (37.8 C) (i.e., OSHA Classes IB and IC); Materials that on account of their physical form or environmental conditions can form explosive mixtures with air and that are readily dispersed in air, such as dusts of combustible solids and mists of flammable or combustible liquid droplets Materials that burn with extreme rapidity, usually by reason of self-contained oxygen (e.g., dry nitrocellulose and many organic peroxides). [ ] 4 Severe Hazard: Materials that will rapidly or completely vaporize at atmospheric pressure and normal ambient temperature or that are readily dispersed in air, and that will burn readily. This degree usually includes: Flammable Gases Flammable Cryogenic Materials Any liquid or gaseous material that is liquid while under pressure and has a flash point below 73 F (22.8 C) and a boiling point below 100 F (37.8 C) (i.e., OSHA Class IA) Materials that ignite spontaneously when exposed to air at a temperature of 130 F (54.4 C) or below ( Pyrophoric ) CHAPTER 2-70 Organic Peroxide [ ] 0 Normally stable. [ ] 1 Can become unstable at high temperatures and pressures, may react non-violently with water. [ ] 2 Normally unstable, readily undergoes violent chemical change, will not detonate, may react violently with water. [ ] 3 Capable of detonation or explosive reaction, require strong initiating source or heat under confinement, may react explosively with water. [ ] 4 Readily capable of detonation or explosive decomposition at normal temperature and pressure. Explosives [ ] 0 Non-explosive. [ ] 1 Insensitive or does not have a mass explosive hazard. [ ] 2 Explosive effect confined to package and no projection of fragments of appreciable size or range expected. [ ] 3 Fire hazard and/or either a minor blast hazard or projection hazard, but does not have mass explosion hazard. [ ] 4 Has a mass explosion hazard or has projection hazard. Compressed Gasses [ ] 1 Pressure below OSHA definition. [ ] 2 Pressurized and meet OSHA definition but < psi absolute at 70 F (21.1 C) [500 psig]. [ ] 3 Pressure > psi absolute at 70 F (21.1 C) [500 psig]. Pyrophorics [ ] 1 No Rating. [ ] 2 No Rating. [ ] 3 No Rating. [ ] 4 Add to definition of Flammability 4. Oxidizers [ ] 1 Packing Group III Solids, Packing Group I and II liquid. [ ] 2 Packing Group II Solids, Liquids exhibit mean pressure rise time (PRT) < the PRT of 1:1 nitric acid/cellulose mixture and criteria for Packing Group I are not met. [ ] 3 Packing Group I Solids, Liquids which spontaneously ignite when mixed with cellulose in 1:1 ratio or mean PRT < PRT of 1:1 perchloric acid/cellulose mixture. Unstable Reactives [ ] 0 Will not polymerize, decompose, condense, or self react. [X] 1 May decompose, condense, or self-react under conditions of high temperature and/or pressure, little or no potential for heat generation or explosion, readily undergo hazardous polymerization in the absence of inhibitors. [ ] 2 May decompose, condense, or self-react at ambient temperature and/or pressure, low potential for significant heat generation or explosion, readily form peroxides upon exposure to air or oxygen at room temperature. [ ] 3 May decompose, condense, or self-react at ambient temperature and/or pressure, moderate potential (or risk) for significant heat generation or explosion. [ ] 4 May decompose, condense, or self-react at ambient temperature and/or pressure, high potential (or risk) for significant heat generation or explosion..