CLEARING AGENT KEY BENEFITS: The Next Generation of Environmentally Safe Histology Products.

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1 CLEARING AGENT l Embalming Historically, toluene and xylene have been used as clearing agents throughout the histology lab in the processes of tissue and slide preparation to remove alcohol and other dehydrants from tissues prior to embedding (usually in paraffin wax), and from finished slides prior to mounting. They are also used after sectioning to remove paraffin wax after cutting on the microtome. However, the effectiveness of xylene and toluene as clearing agents are associated with the ring structures in their molecules, while their double-bonds are related to their hazardous side effects. HistoChoice TM Clearing Agent contains none of the harmful chemicals associated with xylene and toluene. Non-toxic. Non-carcinogenic. Non-flammable with a higher flashpoint than xylene/toluene. Virtually Odorless. Easy to use in confined areas. Non-irritating to human skin**. **Can cause drying of skin after prolonged contact with the liquid. HistoChoice TM Clearing Agent directly replaces xylene and toluene. It is a much more effective alternative to xylene and toluene substitutes including: chlorinated hydrocarbons, terpenes, and other related solvents. Additionally, HistoChoice TM is about twice as effective as parafinnic hydrocarbons. Though less hazardous than xylene and toluene, these substitutes can be effective solvents, but can also leave an oily residue, dry very slowly, and lack the strong solvent characteristics necessary to produce good tissue preparations. They are also considered toxic chemicals posing serious health risks and often have strong odors, making work in confined, poorly ventilated areas difficult. Most are also highly flammable. Compatible with many organic mounting media. Faster wax dissolution, slower evaporation than xylene. No oily residue. Can be used in automated processors. Coverslips easily removed by immersion in HistoChoice. NOTE: Dispose by using standard procedures for xylene disposal. Follow normal laboratory procedures for handling non-polar solvents. HistoChoice TM Clearing Agent is an economical substitute for xylene and toluene. It also does not have the expensive hazardous waste disposal costs that are normally associated with some xylene and toluene substitutes containing harmful elements. Designed to work well with isopropanol. Non-toxic means it s less expensive to ship. Less-flammable for lower storage costs. Minimize compliance costs. Can be easily recycled. HistoChoice Clearing Agent Code Size H103-1L 1 L H103-4L 4 L PS2-901 HistoChoice TM Clearing Agent is Protected Under US Patent #: 5,344,637. A2001 All rights reserved. HistoChoice is a registered trademark of AMRESCO Inc.

2 HistoChoice TM Clearing Agent Compared with Toluene & Xylene TABLE: 1 - Safety Comparison of Toluene & Xylene vs Nap Solvents* Property Flash Points Flammable Toxicities Carcinogenicity Teratogenicity Drying effect on skin Odor Toluene & Xylene Low Strong, Obnoxious Nap Solvents* High (HF-Nap) Less (HF-Nap) No No No Slight, like furniture polish TABLE: 2 - Performance Comparison of Toluene & Xylene vs Nap Solvents* Performance End-Point Relative speeds when dissolving various materials like paraffin wax. Relative solubilities (in grams/ml) when dissolving paraffin wax. Relative efficiencies when removing paraffin wax. Compatibility with equipment like sprayers, driers, automated processors and stainers. Fully recyclable. Toluene & Xylene Nap Solvents* 1.25 & 0.85, respectively 1.25 & 0.85, respectively 1.10 & 1.00 respectively *Nap Solvents compared HistoChoice TM Clearing Agent and Cg - Cyclohexane Solvent. References Available Upon Request. The Next Generation of Environmentally Safe Histology Products. The HistoChoice TM line of products also includes: HistoChoice TM Tissue Fixative HistoChoice TM Pre-Filled Fix Cups HistoChoice TM Molecular Biology Fixative HistoChoice TM Visualization System

3 TISSUE FIXATIVE l Histopathology l Molecular Pathology AMRESCO s non-toxic HistoChoice TM Tissue Fixative is a safe, convenient solution for tissue fixation by laboratory professionals. HistoChoice TM Tissue Fixative improves healthcare delivery because it is safe to use and is gentle on tissues and the environment. HistoChoice TM Tissue Fixative contains none of the harmful chemicals associated with Formalin-based products. Non-toxic and odorless. Can be safely washed down the drain upon neutralization (in most districts). HistoChoice Tissue Fixative H ml 15 ml 100/cs H ml 30 ml 100/cs H ml 60 ml 100/cs H ml 120 ml 100/cs HistoChoice TM Tissue Fixative directly replaces common fixatives including: formalin-based, alcohol-based, Zenker s, B5, Bouin s and other fixatives. Additionally, it can also be used in sequence with other fixatives. HistoChoice TM is compatible with manual and automated processing procedures and equipment, so no changes are needed in laboratory procedures. Tissues fixed with HistoChoice TM Tissue Fixative have a similar appearance to those fixed in formalin-based fixatives and also show more sensitive staining results. Vibrant staining with sharp visual intracellular detail. Better nuclear & cytoplasmic detail. No crosslinking problem of tissues as experienced with Formalin-based fixatives. Clear, consistent results everytime, even after long-term fixation. Ideal transport medium, less expensive to ship, safer to use when compared to formalin-based fixatives. HistoChoice TM does not have the expensive hazardous waste disposal costs normally associated with formalin and other fixatives containing harmful elements. The variety of size offerings available, make HistoChoice TM a more economical product with larger quantities. No more exposure monitoring costs. 20X concentrate available. Minimizes disposal and compliance costs. Non-toxic, means it s less expensive to ship. HistoChoice Tissue Fixative Code Size H108-20L 20 L H108-1G 1 G H131-20L (Contains Alcohol) 20 L PS1-901 HistoChoice TM Tissue Fixative is Protected Under US Patent # s: 5,429,797, & 5,439,667. A2001 All rights reserved. HistoChoice is a registered trademark of AMRESCO Inc.

4 2-Part Fixative System l Embalming The HistoChoice TM 2-Part Fixative System is a safe, non-toxic, and convenient solution for tissue fixation by laboratory professionals. HistoChoice TM tissue fixatives improve healthcare delivery because they are safe to use and gentle on tissues and the environment. HistoChoice TM tissue fixatives contain none of the harmful chemicals associated with Formalin-based products. Non-toxic and odorless. Can be safely washed down the drain upon neutralization. Safe, Easy, and Covenient JUST ADD WATER 19L Water + Component A + Component B = 1X Working Solution HistoChoice TM tissue fixatives directly replace common fixatives including: formalin-based, alcohol-based, Zenker s, B5, Bouin s and other fixatives. Additionally, they can also be used in sequence with other fixatives. HistoChoice TM is compatible with all manual and automated processing procedures and equipment, so no changes are needed in laboratory procedures. Tissues fixed with HistoChoice TM fixative not only have a similar appearance to those fixed in formalin-based fixatives, but also show more sensitive staining results. Vibrant staining with sharp visual intracellular detail. Better nuclear & cytoplasmic detail. Clear consistent results, even after long-term fixation. No crosslinking of tissues experienced with Formalin-based fixatives. *NOTE: 20X concentrations require dilution with water, (and 15-20% alcohol if desired), mixing 19 parts of distilled or deionized water to one part 20X concentrate. The HistoChoice TM 2-Part System offers a convenient, longer-lasting fixative solution. HistoChoice TM fixatives do not have the expensive hazardous waste disposal costs that are normally associated with formalin and other fixatives containing harmful elements. Longer lasting shelf-life. Convenient to use. No more exposure monitoring costs. Minimizes disposal costs and liability. Non-toxic means it s less expensive to ship. HistoChoice 2-Part Fix System Code Size Part A 750 ml + Part B 250 ml = H ml *(20X Solution)1000 ml H950 (OPTIONAL: 20L Container w/spigot) PS7-901 HistoChoice TM Tissue Fixative is Protected Under US Patent # s: 5,429,797, & 5,439,667. A2001 All rights reserved. HistoChoice is a registered trademark of AMRESCO Inc.

5 Dermatology Fixative l Transport Medium AMRESCO s non-toxic HistoChoice TM Dermatology Fixative is a safe, convenient solution for tissue fixation of skin samples. HistoChoice TM Dermatology Fixative improves healthcare delivery because it is safe to use and is gentle on tissues and the environment. HistoChoice TM Dermatology Fixative contains none of the harmful chemicals associated with Formalin-based products. HistoChoice TM Dermatology Fixative is an ideal fixative for histochemistry, immunohistochemistry, and in situ hybridization applications. These important performance, safety and cost features make HistoChoice TM Dermatology Fixative the choice for both healthcare providers and laboratory professionals. Can be safely washed down the drain upon neutralization (in most districts). Non-toxic and odorless. HistoChoice TM Dermatology Fixative is specifically formulated for skin samples and directly replaces common fixatives including: formalinbased, alcohol-based, Zenker s, B5, Bouin s and other fixatives. The fixation characteristics of HistoChoice TM Dermatology Fixative are much better than those of formaldehyde based fixatives, yielding consistent results even after long-term fixation. Carbohydrates, proteins, antigenic sites, and nucleic acids are all effectively preserved. Tissues fixed with HistoChoice TM Dermatology Fixative have a similar appearance to those fixed in formalin-based fixatives and also show more sensitive staining results. No crosslinking of tissues experienced with formalin-based fixatives. Eliminates timeconsuming expensive recovery procedures. Excellent fixation for immunohistochemical and hybridization reactions. Preserves proteins & antigens. Preserves carbohydrates. Preserves nucleic acids. Preserves gross features. HistoChoice TM does not have the expensive hazardous waste disposal costs normally associated with formalin and other fixatives containing harmful elements. The variety of size options makes HistoChoice TM more economical with larger quantities. No more exposure monitoring costs. Minimizes disposal and compliance costs. Non-toxic, means it s less expensive to ship. Flexible packaging options from cups to bulk packed size quantities. HistoChoice Dermatology Fix H115-3 ml 5 ml 500/cs H ml 15 ml 100/cs Size H115-4 L 4 L 1 X 4 L H L 20 L 1 X 20 L (All Derm Fix Solutions Contain 18% Alcohol.) PS HistoChoice TM Dermatology Fixative is Protected Under US Patent # s: 5,429,797, & 5,439,667. A2001 All rights reserved. HistoChoice is a registered trademark of AMRESCO Inc.

6 The Next Generation of Environmentally Safe Molecular Biology Products. Molecular Biology FIX l Molecular Biology l DNA Procedures l mrna Procedures l In Situ Hybridization l Histopathology l Molecular Pathology AMRESCO s HistoChoice TM Molecular Biology (MB) Fixative is a safe, convenient solution for tissue fixation developed specifically for the molecular biologist. HistoChoice TM MB Fixative improves healthcare delivery because it is safe to use and is gentle on tissues and the environment. HistoChoice TM Tissue Fixative contains none of the harmful chemicals associated with Formalin-based products. Odorless and non-toxic. Gentle on your tissue samples. Can be safely washed down the drain upon neutralization (in most districts). HistoChoice MB Code Size H ml 100 ml H120-1L 1 L H120-4L 4 L HistoChoice TM MB is specifically formulated to preserve antigenic sites for antibody probes and nucleic acid sites for in situ hybridizations. HistoChoice TM MB directly replaces common fixatives including: formaldehyde-based, alcoholbased, Zenker s, B5 & B3, Bouin s and other fixatives with superior results. Tissues fixed in HistoChoice TM MB exhibit vibrant staining, better nuclear and cytoplasmic detail, and will retain a crisp appearance even after long-term fixation. HistoChoice TM MB fixed tissue also retains a much more natural look and feel than formalin fixed tissue. *Softer tissues mean easier, smoother cutting and sectioning. Superior sensitivity without predigestion. Markers can be observed at lower antibody levels. Vibrant staining with sharp visual intracellular detail. Full nuclear and cellular detail preserved. Very intense reactions, even after long-term fixation. No crosslinking problem of tissues as experienced with Formalin-based fixatives. Because this formula is designed specifically for molecular biology applications, HistoChoice TM MB fixed sections do not require predigestion or other recovery procedures to make important sites available. This means you spend less time preparing slides and more time doing research. More than a fixative, HistoChoice TM MB is a preservative that leaves antigens and nucleic acids in their native state, allowing binding for specific probes. Primary antibodies can be diluted several-fold due to the increased number of preserved antigenic sites, saving cost on every slide you process. Save costs on every slide processed. No more exposure monitoring costs. Less slide preparation time. Non-toxic, means it s less expensive to ship. Minimizes disposal and compliance costs. Available in multiple sizes. Ideal transport medium. *NOTE: Because soft tissues cut thinner than formalin-hardened samples, we recommend increasing the microtome settings by 1-3 microns. PS4-901 HistoChoice TM MB Fixative is Protected Under US Patent # s: 5,429,797 & 5,439,667. A2001 All rights reserved. HistoChoice is a registered trademark of AMRESCO Inc.

7 Pre-Filled FIX CUPS l Transport Medium AMRESCO s HistoChoice TM Tissue Fixative in prefilled cups are a safe, convenient solution to on-site tissue collection and transport. The widemouth, prelabeled cups are ideal for use in doctors offices, operating rooms, emergency rooms and outpatient clinics. HistoChoice TM improves healthcare delivery because it is safer to use than formalin-based fixatives and is gentle on tissues and the environment. No harmful metals. Non-toxic. Ideal and safe transport medium. HistoChoice Pre-Filled Fix Cups H112-3 ml 5 ml 500/cs H ml 15 ml 100/cs H ml 30 ml 100/cs The preservative characteristics of HistoChoice TM Tissue Fixative make it a more effective fixative than standard formaldehyde based products. It yields vibrant staining characteristics and consistent results, even after long-term fixation. The versatility of HistoChoice TM Tissue Fixative makes it ideal for use in histopathology, cytology, histochemistry, immunohistochemistry and molecular pathology. It preserves tissue integrity, eliminating the need for marker recovery procedures. No crosslinking of tissues experienced with formalin-based fixatives. Eliminates timeconsuming expensive recovery procedures. Excellent fixation for immunohistochemical and hybridization reactions. Preserves proteins & antigens. Preserves carbohydrates. Preserves nucleic acids. Preserves gross features. NOTE: All prefilled cups contain 18% alcohol to facilitate optimal performance for all applications. (Also Available in Bulk Sizes and Concentrate.) HistoChoice TM Tissue Fixative is economical to use. It does not require additional reagents for recovery procedures as do Formalin-based fixatives. HistoChoice TM also eliminates the need for expensive ventilation systems and reduces disposal costs. Free of formaldehyde, mercury & other toxic substances, compliance issues with workers and the environment are minimized. Minimizes disposal and compliance costs. Non-toxic, means it s less expensive to ship. No expensive recovery procedures involving additional reagents and labor hours. Ideal transport medium. HistoChoice Pre-Filled Fix Cups H ml 60 ml 100/cs H ml 120 ml 100/cs H ml 180 ml 50/cs PS3-901 HistoChoice TM Pre-Filled Fix Cups are Protected Under US Patent # s: 5,429,797 & 5,439,667. A2001 All rights reserved. HistoChoice is a registered trademark of AMRESCO Inc.

8 Blank Vial Labels l Embalming Vial Labels AMRESCO offers blank vial labels for our customers convenience when packaging HistoChoice TM Tissue Fixative into small vials. These labels are available in a convenient 10 per sheet format and can be purchased in quantities of 100 (10 sheets). The distinctive green label reminds all those who come in contact with the fixative that they are using a safe, nontoxic direct replacement for formalin-based fixatives, and are greatly improving their work environment by eliminating exposure to this harmful chemical. The label also features an easy writeon surface for recording vital patient information. HistoChoice Blank Vial Labels Code Quantity H901 1 ea H pk HistoChoice TM TISSUE FIXATIVE AMRESCO s HistoChoice TM Tissue Fixative is a safe, convenient solution to on-site tissue collection and transport. It is ideal for use in doctors offices, operating rooms, emergency rooms and outpatient clinics. HistoChoice TM improves healthcare delivery because it is safer to use then formalin-based fixatives and is gentle on tissues and the environment. No formaldehyde. No harmful metals. Non-toxic. Ideal and safe transport medium. Minimizes disposal costs and liability. Non-toxic means it s less expensive to ship. No expensive recovery procedures involving additional reagents and labor hours. HistoChoice TM Tissue Fixative is economical to use. It does not require additional reagents for recovery procedures as do formalin-based fixatives. HistoChoice TM also eliminates the need for expensive ventilation systems and reduces disposal costs. Because it is free of formaldehyde, mercury and other toxic substances, legal Iiabilities with workers and the environment are minimized. No crosslinking of tissues experienced with formalin-based fixatives. Excellent fixation for immunohistochemical and hybridization reactions. Preserves carbohydrates. Preserves proteins. Preserves antigens. Preserves nucleic acids. Preserves gross features. Actual Size of Label PS8-901 HistoChoice TM V Visualization System is Protected Under US Patent #: 5,290,706. A2001 All rights reserved. HistoChoice is a registered trademark of AMRESCO Inc.

9 Visualization System l Histopathology AMRESCO s HistoChoice TM Visualization System (VS) is a safe, non-toxic tissue fixative solution. It acts as an effective marker in every step of the process. HistoChoice TM VS tissue fixative contains none of the harmful chemicals associated with Formalin-based products and is gentle on tissues and the environment. Odorless and non-toxic. Drain disposable after neutralization (in most districts). HistoChoice Visual System H153-3 ml 5 ml 500/cs H ml 15 ml 100/cs H ml 30 ml 100/cs H ml 120 ml 100/cs The HistoChoice TM Visualization System is designed to maximize the visibility of your tissue samples. Specimens fixed in HistoChoice TM VS will be tinted green, increasing visibility and allowing even the smallest samples to be easily located. This special colorization system will not carry-over to routine or special staining procedures. Tissues fixed in HistoChoice TM VS exhibit vibrant staining and will retain a crisp appearance even after long-term fixation. Fixed tissue also retains a much more natural look and feel than formalin fixed tissue. *Softer tissues mean easier, smoother cutting and sectioning. Superior sensitivity without predigestion. Vibrant staining with sharp visual intracellular detail. Full nuclear and cellular detail preserved. No crosslinking problem of tissues as experienced with Formalin-based fixatives. *NOTE: Because soft tissues cut thinner than formalin-hardened samples, we recommend increasing the microtome settings by 1-3 microns. (Also Available in Bulk Sizes and Concentrate.) Reagent mixups will no longer occur since HistoChoice TM VS can be easily distinguished from alcohol, saline and other colorless liquids. Save costs on every slide processed. No more exposure monitoring costs. Less slide preparation time. Non-toxic, means it s less expensive to ship. Minimizes disposal and compliance costs. Available in convenient sizes. Ideal transport medium. HistoChoice Visual System H158-3 ml 5 ml 500/cs H ml 15 ml 100/cs H ml 30 ml 100/cs H ml 120 ml 100/cs These Prefilled Cups contain 18% Alcohol. PS5-901 HistoChoice TM VS Visualization System is Protected Under US Patent #: 5,290,706. A2001 All rights reserved. HistoChoice is a registered trademark of AMRESCO Inc.

10 Mounting Media l Embalming COMPATIBILITY AMRESCO s HistoChoice TM Mounting Media is an excellent medium for standard tissue slide preparation. HistoChoice TM Mounting Media was designed to work in conjunction with AMRESCO s HistoChoice TM Clearing Agent, but can also be used as a seperate stand-alone medium for standard slide preparation. It is suitable for both thick or thin specimen mounting. Works for all types/sizes of specimens. Compatible with all mounting methods and laboratory processes. HistoChoice Mounting Media Code Size H ml 120 ml H ml 475 ml HistoChoice TM Mounting Media is a compatible medium for mounting and preserving microscope slide specimens with superior results. HistoChoice TM Mounting Media will not crack or discolor with age. It can be used with immersion oil. The low viscosity of this mounting media means easier application resulting in bubblefree preparations which can save valuable lab time. Does not crack or splinter with aging. Will not discolor. Can be used with immersion oil. Low viscosity. Quicker preparation time. Bubble-free slide preparations. Hassle-free tissue slide preparation that is quicker and more efficient, resulting in a savings of valuable lab time and resources. Better long-term slide preservation which retains clearer archival visibility. Save costs on every slide processed. Less slide preparation time. Available in convenient sizes. Better archival properties. More consistent results. TECH-TIP: If the coverslip needs to be removed from a stained slide, simply soak the slide in HistoChoice TM Clearing Agent for 1-2 hours or dip into a Coplin jar of xylene. PS6-901 HistoChoice TM Mounting Media is Protected Under US Patent #: 5,344,637. A2001 All rights reserved. HistoChoice is a registered trademark of AMRESCO Inc.

11 Ancillary Alcohols l Embalming HistoChoice AMRESCO s HistoChoice TM line of products was engineered and developed to provide a safe, non-toxic alternative to the most commonly used products on the market. HistoChoice TM products are safe to handle for the user and not harmful to the environment. All of the products in AMRESCO s patented HistoChoice TM line feature the benefits of superior safety, optimal performance, and strong value. These products perform as well or better than the standards currently used in the industry. They are manufactured under controlled conditions and thoroughly tested for batch consistency. AMRESCO also provides several quality ancillary products that can be used in conjunction with HistoChoice TM products or as individual products. HistoChoice TM Ancillary Alcohols AMRESCO s alcohols provide purities high enough for your most demanding histological applications. Each lot has been tested for a variety of impurities which can interfere with tissue processing and staining. Both are offered as 100% (absolute) alcohol and contain no water. Strict adherence to regulatory guidelines and stringent Quality Control assure the user of the same high purity, consistent from lot to lot. Each type of alcohol is offered in convenient, easy to pour 4 liter (1.1 gal) containers which can be easily handled by laboratory personnel. For those who prefer larger containers, we also offer a 20 liter (5.3 gal) container which can easily be stored on a laboratory shelf and used as needed. This size also offers a cost savings for the user because of the reduced packaging required. All AMRESCO alcohols are provided in safe, polyethylene bottles, which will not break or corrode, reducing the hazard to technicians and others who must handle the products. Also, our Denatured blend of ethanol is a blend of 95% ethanol and 5% isopropanol, and does not contain harmful methanol or methyl ethyl ke- tones and methyl isobutyl ketones which can interfere with laboratory procedures. AMRESCO HistoChoice alcohols offer safety, convenience and the purity you demand for all your histology applications. Highest Purity. Quality Controlled Manufacturing. Non-photochemically reactive. Easy to pour, non-corrosive PE containers. Available in multiple sizes. HistoChoice Ancillary Alcohols Product Code Size Isopropanol L 4 X 4 L 20 L Ethanol E402 4 L (Anhydrous) 4 X 4 L 20 L PS9-901 A2001 All rights reserved. HistoChoice is a registered trademark of AMRESCO Inc.