International Chemical Safety Cards TEMEPHOS ICSC: 0199 O,O,O',O'-Tetramethyl O,O'-thiodi-p-phenylene bis(phosphorothioate) O,O'-(thiodi-4,1-phenylene) bis(O,O-dimethylphosphorothioate) Phosphorothioic acid, O,O'-(thiodi-4,1-phenylene) O,O,O',O'-tetramethyl ester C16H20O6P2S3 Molecular mass: 466.5 ICSC #    0199 CAS #     3383-96-8 RTECS # TF6890000 UN #        2783 March 13, 1995 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. Liquid formulations containing organic solvents may be flammable. Gives off irritating or toxic fumes (or gases) in a fire. NO open flames. Powder, water spray, foam, carbon dioxide. EXPLOSION In case of fire: keep drums, etc., cool by spraying with water. EXPOSURE PREVENT DISPERSION OF DUST!  •INHALATION Ventilation (not if powder), local exhaust, or breathing protection. Fresh air, rest.  •SKIN Protective gloves. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •EYES Face shield, or eye protection in combination with breathing protection. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Do NOT wash away into sewer. Sweep spilled substance into covered containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. (Extra personal protection: P3 filter respirator for toxic particles). Separated from food and feedstuffs. Well closed. Do not transport with food and feedstuffs. Marine pollutant. R: S: UN Hazard Class: 6.1 UN Packing Group: III SEE IMPORTANT INFORMATION ON BACK ICSC: 0199 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

International Chemical Safety Cards TEMEPHOS ICSC: 0199 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS OR WHITE CRYSTALS. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating or on burning producing toxic fumes such as phosphorous oxides and sulfur oxides. Reacts with strong acids and bases (hydrolysis). OCCUPATIONAL EXPOSURE LIMITS: TLV: 10 mg/m3 (ACGIH 1994-1995). OSHA PEL: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp) NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp) NIOSH IDLH: No data ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. INHALATION RISK: Evaporation at 20°C is negligible; a nuisance-causing concentration of airborne particles can, however, be reached quickly. EFFECTS OF SHORT-TERM EXPOSURE: Cholinesterase inhibitor in animals. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Melting point: 30.0-30.5°C Solubility in water: none Octanol/water partition coefficient as log Pow: 5.96 ENVIRONMENTAL DATA The substance is toxic to aquatic organisms. This substance may be hazardous to the environment; special attention should be given to honey bees. N O T E S Carrier solvents used in commercial formulations may change physical and toxicological properties. Abate, Abathion, Swebate, Nimitex and Biothion are trade names. Transport Emergency Card: TEC (R)-61G41c ADDITIONAL INFORMATION ICSC: 0199 TEMEPHOS (C) IPCS, CEC, 1994

IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.