International Chemical Safety Cards CYANOGEN CHLORIDE ICSC: 1053 Chlorine cyanide Chlorocyanide Chlorocyanogen ClCN Molecular mass: 61.5 (cylinder) ICSC #    1053 CAS #     506-77-4 RTECS # GT2275000 UN #        1589 (inhibited) October 19, 1999 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Not combustible. Heating will cause rise in pressure with risk of bursting. Gives off irritating or toxic fumes (or gases) in a fire. In case of fire in the surroundings: all extinguishing agents allowed. EXPLOSION In case of fire: cool cylinder by spraying with water but avoid contact of the substance with water. EXPOSURE AVOID ALL CONTACT!  •INHALATION Sore throat. Drowsiness. Confusion. Nausea. Vomiting. Cough. Unconsciousness. Symptoms may be delayed (see Notes). Local exhaust or breathing protection. Fresh air, rest. Half-upright position. Artificial respiration if indicated. Refer for medical attention.  •SKIN ON CONTACT WITH LIQUID: FROSTBITE. THE LIQUID MAY BE ABSORBED. Redness. Pain. Cold-insulating gloves. Protective clothing. ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention.  •EYES ON CONTACT WITH LIQUID: FROSTBITE. Redness. Pain. 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. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Evacuate danger area! Consult an expert! Ventilation. NEVER direct water jet on liquid. Remove vapour cloud with fine water spray. Do NOT wash away into sewer. Chemical protection suit including self-contained breathing apparatus. Fireproof if in building. Provision to contain effluent from fire extinguishing. Cool. Marine pollutant. R: S: UN Hazard Class: 2.3 UN Subsidiary Risks: 8 SEE IMPORTANT INFORMATION ON BACK ICSC: 1053 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 CYANOGEN CHLORIDE ICSC: 1053 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS COMPRESSED LIQUEFIED GAS , WITH PUNGENT ODOUR. PHYSICAL DANGERS: The gas is heavier than air. CHEMICAL DANGERS: The substance decomposes on heating producing toxic and corrosive fumes (hydrogen cyanide, hydrochloric acid, nitrogen oxides). Reacts slowly with water or water vapour to form hydrogen chloride. OCCUPATIONAL EXPOSURE LIMITS: TLV: 0.3 ppm; as (ceiling value) (ACGIH 1999). OSHA PEL: none NIOSH REL: C 0.3 ppm (0.6 mg/m3) NIOSH IDLH: No data ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation. INHALATION RISK: A harmful concentration of this gas in the air will be reached very quickly on loss of containment. EFFECTS OF SHORT-TERM EXPOSURE: Tear drawing. The substance severely irritates the eyes, the skin and the respiratory tract. The substance may cause effects on the cellular respiration , resulting in convulsions and unconsciousness . Exposure may result in death. Medical observation is indicated. See Notes. Inhalation of the substance may cause lung oedema (see Notes). The effects may be delayed. Rapid evaporation of the liquid may cause frostbite. Medical observation is indicated. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point: 13.8°C Melting point: -6°C Solubility in water: soluble Vapour pressure, kPa at 21.1°C: 1987 Relative vapour density (air = 1): 2.16 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. The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation is therefore essential. Immediate administration of an appropriate spray, by a doctor or a person authorized by him/her, should be considered. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. Do NOT spray water on leaking cylinder (to prevent corrosion of cylinder). Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. Transport Emergency Card: TEC (R)-801 ADDITIONAL INFORMATION ICSC: 1053 CYANOGEN CHLORIDE (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.