Section 1 - Chemical Product and Company Identification AC , AC , AC , AC , AC

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1 Material Safety Data Sheet 4-(Hydroxymercury)benzoic acid sodium salt MSDS# MSDS Name: Catalog Numbers: Synonyms: Section 1 - Chemical Product and Company Identification 4-(Hydroxymercury)benzoic acid sodium salt AC , AC , AC , AC , AC p-chloromercuribenzoate; Sodium (4-carboxylatophenyl)hydroxymercurate(1-); Sodium p- hydroxymercuribenzoate. Acros Organics BVBA Company Identification: Janssen Pharmaceuticalaan 3a 2440 Geel, Belgium Acros Organics Company Identification: (USA) One Reagent Lane Fair Lawn, NJ For information in the US, call: 800-ACROS-01 For information in Europe, call: Emergency Number, Europe: Emergency Number US: CHEMTREC Phone Number, US: CHEMTREC Phone Number, Europe: Section 2 - Composition, Information on Ingredients CAS#: Chemical Name: Mercurate(1-),(4-carboxylatophenyl)hydroxy-, sodium salt %: 100 EINECS#: Hazard Symbols: T+ Risk Phrases: 26/27/28 33 Section 3 - Hazards Identification EMERGENCY OVERVIEW Caution! The toxicological properties of this material have not been fully investigated. May cause central nervous system effects. May cause eye and skin irritation. May cause respiratory and digestive tract irritation. Target Organs: Central nervous system. Potential Health Effects Eye: May cause eye irritation. Skin: May cause skin irritation. May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully Ingestion: investigated. Inorganic mercury compounds may cause central and peripheral nervous system effects. May cause respiratory tract irritation. The toxicological properties of this substance have not been fully Inhalation: investigated. Acute exposure to high concentrations of mercury vapors may cause severe respiratory tract

2 Chronic: Eyes: Skin: Ingestion: Inhalation: Notes to Physician: General Information: Extinguishing Media: irritation. Chronic exposure to mercury may cause permanent central nervous system damage, fatigue, weight loss, tremors, personality changes. Chronic ingestion may cause accumulation of mercury in body tissues. Chronic exposure to mercury vapors may produce weakness, fatigue, anorexia, loss of weight and gastrointestinal disturbances which is collectively referred to as asthenic-vegetative syndrome or micromercurialism. Chronic exposure to mercury compounds may produce immunologic glomerular disease. Section 4 - First Aid Measures Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid. Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. Section 5 - Fire Fighting Measures As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire. Use water spray, dry chemical, carbon dioxide, or appropriate foam. Autoignition Not applicable. Temperature: Flash Point: Not applicable. Explosion Limits: Lower: Explosion Limits: Upper: NFPA Rating: health: 2; flammability: 0; instability: 0; General Information: Spills/Leaks: Handling: Storage: Section 6 - Accidental Release Measures Use proper personal protective equipment as indicated in Section 8. Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, observing precautions in the Protective Equipment section. Avoid generating dusty conditions. Provide ventilation. Section 7 - Handling and Storage Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Poison room locked. Section 8 - Exposure Controls, Personal Protection Chemical Name ACGIH NIOSH OSHA - Final PELs Mercurate(1-),(4-ca 0.1 mg/m3 TWA (as 0.05 mg/m3 TWA none listed rboxylatophenyl)hyd Hg) (listed (vapor, except roxy-, sodium salt under Mercury, organo alkyls, as aryl and Hg) (listed inorganic under Mercury compounds).skin compounds).10 - potential mg/m3 IDLH (as significant Hg, except contribution to Organo(alkyl)

3 overall exposure compounds) by the cutaneous (listed under r oute (listed Mercury under Mercury, compounds). aryl and OSHA Vacated PELs: Mercurate(1-),(4-carboxylatophenyl)hydroxy-, sodium salt: None listed Engineering Controls: Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate ventilation to keep airborne concentrations low. Exposure Limits Personal Protective Equipment Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face Eyes: protection regulations in 29 CFR or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure. A respiratory protection program that meets OSHA's 29 CFR and ANSI Z88.2 requirements or Respirators: European Standard EN 149 must be followed whenever workplace conditions warrant respirator use. Chemical Stability: Conditions to Avoid: Incompatibilities with Other Materials Hazardous Decomposition Products Hazardous Polymerization Section 9 - Physical and Chemical Properties Physical State: Powder Color: white Odor: ph: Vapor Pressure: Vapor Density: Evaporation Rate: Viscosity: Boiling Point: Freezing/Melting Point: 0 deg C ( F) Decomposition Temperature: Solubility in water: slightly soluble in water Specific Gravity/Density: Molecular Formula: C7H5HgNaO3 Molecular Weight: Section 10 - Stability and Reactivity Stable under normal temperatures and pressures. Incompatible materials, dust generation, excess heat, strong oxidants. Carbon monoxide, carbon monoxide, carbon dioxide, mercury/mercury oxides, sodium oxide. Has not been reported. Section 11 - Toxicological Information RTECS#: CAS# : OV LD50/LC50: RTECS:. Mercurate(1-),(4-carboxylatophenyl)hydroxy-, sodium salt - Not listed as a carcinogen by ACGIH, Carcinogenicity: IARC, NTP, or CA Prop 65. Other: See actual entry in RTECS for complete information. Section 12 - Ecological Information Section 13 - Disposal Considerations

4 Dispose of in a manner consistent with federal, state, and local regulations. Section 14 - Transport Information US DOT Shipping Name: PHENYLMERCURIC COMPOUND, N.O.S. Hazard Class: 6.1 UN Number: UN2026 Packing Group: II Canada TDG Shipping Name: Hazard Class: UN Number: Packing Group: European/International Regulations US Federal TSCA European Labeling in Accordance with EC Directives Hazard Symbols: T+ Risk Phrases: Section 15 - Regulatory Information R 26/27/28 Very toxic by inhalation, in contact with skin and if swallowed. R 33 Danger of cumulative effects. Safety Phrases: S 13 Keep away from food, drink and animal feeding stuffs. S 28A After contact with skin, wash immediately with plenty of water. S 36 Wear suitable protective clothing. S 37 Wear suitable gloves. S 45 In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible). WGK (Water Danger/Protection) Canada CAS# : CAS# is listed on Canada's DSL List Canadian WHMIS Classifications: This product has been classified in accordance with the hazard criteria of the Controlled Products Regulations and the MSDS contains all of the information required by those regulations. CAS# is not listed on Canada's Ingredient Disclosure List. CAS# is listed on the TSCA Inventory. Section 16 - Other Information MSDS Creation Date: 7/09/1999 Revision #5 Date 7/20/2009 The information above is believed to be accurate and represents the best information currently available to us. However, we make no warranty of merchantibility or any other warranty, express or implied, with respect to such information, and we assume no liability resulting from its use. Users should make their own investigations to determine the suitability of the information for their particular purposes. In no event shall the company be liable for any claims, losses, or damages of any third party or for lost profits or any special, indirect, incidental, consequential, or exemplary damages howsoever arising, even if the

5 company has been advised of the possibility of such damages