Revision Date 09-May-2012 SECTION 1. IDENTIFICATION OF THE SUBSTANCE/MIXTURE AND OF THE COMPANY/UNDERTAKING.

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1 Creation Date 22-Oct-2009 SECTION 1. IDENTIFICATION OF THE SUBSTANCE/MIXTURE AND OF THE COMPANY/UNDERTAKING Revision Number 4 Product Identifier Product Description: Cat No. O/0650/70, O/0650/62, O/0650/60, O/0650/53, O/0650 Synonyms Ethanedionic acid Relevant identified uses of the substance or mixture and uses advised against Recommended Use Laboratory chemicals Uses advised against No Information available Details of the supplier of the safety data sheet Company Fisher Scientific UK Bishop Meadow Rd Loughborough, Leicestershire, Great Britain LE115RG Tel: address begel.sdsdesk@thermofisher.com Emergency Telephone Number Tel: Chemtrec US: (800) Chemtrec EU: 001 (202) SECTION 2. HAZARDS IDENTIFICATION Classification of the substance or mixture REGULATION (EC) No 1272/2008 Acute oral toxicity Category 4 Acute dermal toxicity Category 4 Serious Eye Damage/Eye Irritation Category 1 Classification according to EU Directives 67/548/EEC or 1999/45/EC For the full text of the R-phrases and H-Statements mentioned in this Section, see Section 16 Symbol(s) Xn - Harmful R-phrase(s) Risk Combination Phrases R21/22 - Harmful in contact with skin and if swallowed Page 1 / 9

2 Label Elements SECTION 2. HAZARDS IDENTIFICATION Signal Word Hazard Statements H302 - Harmful if swallowed H312 - Harmful in contact with skin H318 - Causes serious eye damage Danger Precautionary Statements - EU ( 28, 1272/2008) P280 - Wear protective gloves/ protective clothing/ eye protection/ face protection P305 + P351 + P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing P302 + P352 - IF ON SKIN: Wash with plenty of soap and water P301 + P330 + P331 - IF SWALLOWED: rinse mouth. Do NOT induce vomiting P301 + P312 - IF SWALLOWED: Call a POISON CENTER or doctor/ physician if you feel unwell Other Hazards SECTION 3. COMPOSITION/INFORMATION ON INGREDIENTS Component EC-No. Weight % CAS-No 67/548/EEC Classification Oxalic acid CLP Classification - Regulation (EC) No 1272/2008 EEC No Xn; R21/22 Acute Tox. 4 (H302) Acute Tox. 4 (H312) Eye Dam. 1 (H318) > Xn;R21/22 Acute Tox. 4 (H302) Acute Tox. 4 (H312) Eye Dam. 1 (H318) REACH No. - - For the full text of the R-phrases and H-Statements mentioned in this Section, see Section 16 Page 2 / 9

3 SECTION 4. FIRST AID MEASURES Description of first aid measures Eye Contact Skin Contact Ingestion Inhalation Notes to Physician Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Immediate medical attention is required. Wash off immediately with plenty of water for at least 15 minutes. Immediate medical attention is required. Do not induce vomiting. Call a physician or Poison Control Center immediately. Move to fresh air. If breathing is difficult, give oxygen. Do not use mouth-to-mouth resuscitation if victim ingested or inhaled the substance; induce artificial respiration with a respiratory medical device. Obtain medical attention. Treat symptomatically SECTION 5. FIRE-FIGHTING MEASURES Extinguishing media Suitable Extinguishing Media CO2, dry chemical, dry sand, alcohol-resistant foam. Extinguishing media which must not be used for safety reasons Special hazards arising from the substance or mixture Thermal decomposition can lead to release of irritating gases and vapors. Advice for fire-fighters As in any fire, wear self-contained breathing apparatus pressure-demand, MSHA/NIOSH (approved or equivalent) and full protective gear SECTION 6. ACCIDENTAL RELEASE MEASURES Personal precautions, protective equipment and emergency procedures Use personal protective equipment. Ensure adequate ventilation. Avoid dust formation. Do not get in eyes, on skin, or on clothing. Environmental precautions Should not be released into the environment. Page 3 / 9

4 Methods and material for containment and cleaning up Sweep up or vacuum up spillage and collect in suitable container for disposal. Avoid dust formation. SECTION 7. HANDLING AND STORAGE Precautions for Safe Handling Wear personal protective equipment. Ensure adequate ventilation. Avoid dust formation. Do not breathe dust. Do not get in eyes, on skin, or on clothing. Conditions for safe storage, including any incompatibilities Keep containers tightly closed in a dry, cool and well-ventilated place. Protect from moisture. Do not store in metal containers. Corrosives area. Specific End Uses Control parameters SECTION 8. EXPOSURE CONTROLS/PERSONAL PROTECTION Exposure limits Component European Union The United Kingdom France Belgium Spain Oxalic acid TWA: 1 mg/m 3 8 hr STEL: 2 mg/m 3 15 min TWA: 1 mg/m 3 8 hr VME: 1 mg/m 3 8 heures. indicative limit TWA: 1 mg/m 3 8 uren STEL: 2 mg/m 3 15 minuten VLA-ED: 1 mg/m 3 8 horas Component Italy Germany Portugal The Netherlands Finland STEL: 2 mg/m 3 15 minutos TWA: 1 mg/m 3 8 horas Oxalic acid TWA: 1 mg/m 3 8 ore. TWA: 1 mg/m 3 8 Stunden. inhalable fraction exposure factor 1 TWA: 1 mg/m 3 8 uren TWA: 1 mg/m 3 8 tunteina STEL: 3 mg/m 3 15 minuutteina Skin Component Austria Denmark Switzerland Poland Norway Oxalic acid Skin TWA: 1 mg/m 3 8 Stunden TWA: 1 mg/m 3 8 timer MAK: 1 mg/m 3 8 Stunden NDSCh: 2 mg/m 3 15 minutach TWA: 1 mg/m 3 8 godzinach TWA: 1 mg/m 3 8 timer STEL: 3 mg/m 3 15 minutter. Component Bulgaria Croatia Ireland Cyprus Czech Republic Oxalic acid TWA: 1.0 mg/m 3 TWA: 1 mg/m 3 8 satima. TWA: 1 mg/m 3 8 hr. TWA: 1 mg/m 3 TWA: 1 mg/m 3 8 hodinách. Potential for cutaneous absorption Ceiling: 5 mg/m 3 Page 4 / 9

5 Component Estonia Gibraltar Greece Hungary Iceland TWA: 1 mg/m 3 8 hr TWA: 1 mg/m 3 TWA: 1 mg/m 3 8 órában. Oxalic acid TWA: 1 mg/m 3 8 tundides. STEL: 2 mg/m 3 15 minutites. TWA: 1 mg/m 3 8 klukkustundum. Ceiling: 2 mg/m 3 Component Latvia Lithuania Luxembourg Malta Romania TWA: 1 mg/m 3 TWA: 1 mg/m 3 8 ore Oxalic acid TWA: 1 mg/m 3 TWA: 1 mg/m 3 TWA: 1 mg/m 3 8 Stunden Component Russia - TWA Slovak Republic Slovenia Sweden Turkey Oxalic acid TWA: 1 mg/m 3 TWA: 1 mg/m 3 8 urah STV: 2 mg/m 3 15 TWA: 1 mg/m 3 8 saat inhalable fraction minuter LLV: 1 mg/m 3 8 timmar. Skin notation MAC: 1 mg/m 3 Biological limit values Derived No Effect Level (DNEL) Predicted No Effect Concentration (PNEC) This product, as supplied, does not contain any hazardous materials with biological limits established by the region specific regulatory bodies. Exposure controls Engineering Measures Personal protective equipment Eye Protection Hand Protection Skin and body protection Respiratory Protection Ensure adequate ventilation, especially in confined areas Ensure that eyewash stations and safety showers are close to the workstation location Safety glasses with side-shields Protective gloves Long sleeved clothing When workers are facing concentrations above the exposure limit they must use appropriate certified respirators Hygiene Measures Environmental exposure controls Handle in accordance with good industrial hygiene and safety practice Do not allow material to contaminate ground water system SECTION 9. PHYSICAL AND CHEMICAL PROPERTIES Physical State Powder, Solid Appearance White odor odorless ph M aq. solution Vapor Pressure C Vapor Density 4.62 Boiling Point/Range Melting Point/Range C / F Page 5 / 9

6 SECTION 9. PHYSICAL AND CHEMICAL PROPERTIES Decomposition temperature 157 C Flash Point Autoignition Temperature Water Solubility 138 g/l (20 C) Molecular Formula C2 H2 O4. 2 H2 O Molecular Weight SECTION 10. STABILITY AND REACTIVITY Reactivity Chemical Stability Stable under normal conditions Possibility of Hazardous Reactions Hazardous Polymerization Hazardous Reactions. No information available Conditions to Avoid Avoid dust formation, Incompatible products, Excess heat, Exposure to moisture. Incompatible Materials Strong oxidizing agents, Strong bases, Metals, Acid chlorides. Hazardous Decomposition Products Carbon monoxide (CO). Carbon dioxide (CO2). SECTION 11. TOXICOLOGICAL INFORMATION Information on Toxicological Effects Acute Toxicity Product Information Component Information Component LD50 Oral LD50 Dermal LC50 Inhalation Oxalic acid 7500 mg/kg ( Rat ) 375 mg/kg ( Rat ) mg/kg ( Rat ) Page 6 / 9

7 Chronic Toxicity Carcinogenicity There are no known carcinogenic chemicals in this product Sensitization Mutagenic Effects Reproductive Effects Developmental Effects Teratogenicity Target Organs Other Adverse Effects Endocrine Disruptor Information No information available Experiments have shown reproductive toxicity effects on laboratory animals Developmental effects have occurred in experimental animals Teratogenic effects have occurred in experimental animals. Liver Kidney Respiratory system Eyes Skin See actual entry in RTECS for complete information None known SECTION 12. ECOLOGICAL INFORMATION Toxicity Ecotoxicity effects Contains no substances known to be hazardous to the environment or that are not degradable in waste water treatment plants Component Freshwater Algae Freshwater Fish Microtox Water Flea Oxalic acid 4000 mg/l LC50 24 h EC50 = mg/l/48h Persistence and degradability No information available Bioaccumulative potential Component Oxalic acid Mobility in soil Results of PBT and vpvb assessment Other adverse effects No information available log Pow Page 7 / 9

8 SECTION 13. DISPOSAL CONSIDERATIONS Waste treatment methods Waste from Residues / Unused Products Contaminated Packaging Dispose of in accordance with local regulations Empty containers should be taken to local recyclers for disposal SECTION 14. TRANSPORT INFORMATION IMDG/IMO UN-No UN3261 Hazard Class 8 Packing Group III Proper Shipping Name Corrosive solid, acidic, organic, n.o.s ADR UN-No UN3261 Hazard Class 8 Packing Group III Proper Shipping Name Corrosive solid, acidic, organic, n.o.s IATA UN-No UN3261 Hazard Class 8 Packing Group III Proper Shipping Name Corrosive solid, acidic, organic, n.o.s SECTION 15. REGULATORY INFORMATION Safety, health and environmental regulations/legislation specific for the substance or mixture International Inventories Component EINECS ELINCS NLP TSCA DSL NDSL PICCS ENCS CHINA AICS KECL Oxalic acid T X - X X X X X X X X X - Legend Page 8 / 9

9 TSCA - United States Toxic Substances Control Act Section 8(b) Inventory EINECS/ELINCS - European Inventory of Existing Commercial Chemical Substances/EU List of Notified Chemical Substances DSL/NDSL - Canadian Domestic Substances List/Non-Domestic Substances List PICCS - Philippines Inventory of Chemicals and Chemical Substances ENCS - Japan Existing and New Chemical Substances CHINA - China Inventory of Existing Chemical Substances AICS - Inventory of Chemical Substances KECL - Existing and Evaluated Chemical Substances Chemical Safety Assessment SECTION 16. OTHER INFORMATION Full text of R-phrases referred to under sections 2 and 3 R21/22 - Harmful in contact with skin and if swallowed Revision Date 09-May-2012 Revision Summary Reason for revision (M)SDS sections updated, 2, 3, 14. This safety data sheet complies with the requirements of Regulation (EC) No. 1907/2006 Disclaimer The information provided on this Safety Data Sheet is correct to the best of our knowledge, information and belief at the date of its publication. The information given is designed only as a guide for safe handling, use, processing, storage, transportation, disposal and release and is not to be considered as a warranty or quality specification. The information relates only to the specific material designated and may not be valid for such material used in combination with any other material or in any process, unless specified in the text. End of Safety Data Sheet Page 9 / 9