International Chemical Safety Cards o-CHLOROBENZYLIDENEMALONONITRILE ICSC: 1065 2-(Chlorophenyl)methylenemalononitrile 2-Chlorobenzylidene malononitrile (o-Chlorobenzal)malononitrile beta,beta-Dicyano-o-chlorostyrene (2-Chlorophenyl)methylenepropanedinitrile CS (riot control agent) C10H5ClN2 / ClC6H4CH=C(CN)2 Molecular mass: 188.6 ICSC #    1065 CAS #     2698-41-1 RTECS # OO3675000 UN #        3276 October 09, 2002 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire. NO open flames. Powder or carbon dioxide. EXPLOSION Finely dispersed particles form explosive mixtures in air. Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting. EXPOSURE PREVENT DISPERSION OF DUST!  •INHALATION Cough. Dizziness. Headache. Laboured breathing. Nausea. Sore throat. Vomiting. Local exhaust. Fresh air, rest.  •SKIN Redness. Burning sensation. Pain. Blisters. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •EYES Causes watering of the eyes. Redness. Pain. Safety goggles, or face shield. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Burning sensation in the throat and chest. Do not eat, drink, or smoke during work. Give plenty of water to drink. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Vacuum spilled material. (Extra personal protection: P3 filter respirator for toxic particles.) Separated from food and feedstuffs . Keep in a well-ventilated room. Do not transport with food and feedstuffs. R: S: UN Hazard Class: 6.1 UN Packing Group: III SEE IMPORTANT INFORMATION ON BACK ICSC: 1065 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 o-CHLOROBENZYLIDENEMALONONITRILE ICSC: 1065 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: WHITE CRYSTALLINE POWDER , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: CHEMICAL DANGERS: Reacts with strong bases or acids producing ammonia . The substance decomposes on burning producing toxic fumes including hydrogen chloride , hydrogen cyanide and nitrogen oxides . Reacts violently with strong oxidants causing fire and explosion hazard. OCCUPATIONAL EXPOSURE LIMITS: TLV: 0.05 ppm (Ceiling value); (skin); A4; (ACGIH 2002). NIOSH REL: C 0.05 ppm (0.4 mg/m3) skin NIOSH IDLH: 2 mg/m3 ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation, through the skin and by ingestion. INHALATION RISK: Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying or when dispersed, especially if powdered. EFFECTS OF SHORT-TERM EXPOSURE: Causes watering of the eyes. The substance is severely irritating to the eyes , the skin and the respiratory tract The substance may cause effects on the lungs . EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. Repeated or prolonged contact may cause skin sensitization. PHYSICAL PROPERTIES Boiling point: 310-315°C Melting point: 93-96°C Solubility in water, g/100 ml at 20°C: 0.1-0.5 Vapour pressure, Pa at °C: 0.0045 Relative vapour density (air = 1): 6.5 ENVIRONMENTAL DATA The substance is very toxic to aquatic organisms. N O T E S The occupational exposure limit value should not be exceeded during any part of the working exposure. Transport Emergency Card: TEC (R)-61GT1-III ADDITIONAL INFORMATION ICSC: 1065 o-CHLOROBENZYLIDENEMALONONITRILE (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.