International Chemical Safety Cards CARBONYL FLUORIDE ICSC: 0633 Carbon oxyfluoride Carbon difluoride oxide Difluoroformaldehyde Fluorophosgene COF2 Molecular mass: 66.0 (cylinder) ICSC #    0633 CAS #     353-50-4 RTECS # FG6125000 UN #        2417 November 24, 2003 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. In case of fire in the surroundings: NO hydrous agents. EXPLOSION In case of fire: cool cylinder by spraying with water but avoid contact of the substance with water. Combat fire from a sheltered position. EXPOSURE STRICT HYGIENE!  •INHALATION Burning sensation. Sore throat. Cough. Laboured breathing. Shortness of breath. Symptoms may be delayed (see Notes). Ventilation, local exhaust, or breathing protection. Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.  •SKIN ON CONTACT WITH LIQUID: FROSTBITE. 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: Redness. Pain. Blurred vision. Severe deep burns. 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 SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Evacuate danger area! Consult an expert! Ventilation. NEVER direct water jet on liquid. Gas-tight chemical protection suit including self-contained breathing apparatus. Fireproof if in building. Cool. R: S: UN Hazard Class: 2.3 UN Subsidiary Risks: 8 SEE IMPORTANT INFORMATION ON BACK ICSC: 0633 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 CARBONYL FLUORIDE ICSC: 0633 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS HYGROSCOPIC COMPRESSED LIQUEFIED GAS , WITH PUNGENT ODOUR. PHYSICAL DANGERS: The gas is heavier than air. CHEMICAL DANGERS: The substance decomposes on heating at 450-490°C producing toxic gases . Reacts with water and moist air to produce toxic and corrosive gases ( hydrogen fluoride , see ICSC 0283). OCCUPATIONAL EXPOSURE LIMITS: TLV: 2 ppm as TWA; 5 ppm as STEL; (ACGIH 2003). OSHA PEL: none NIOSH REL: TWA 2 ppm (5 mg/m3) ST 5 ppm (15 mg/m3) NIOSH IDLH: No data ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of the gas. 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: The substance is irritating to the eyes , the skin and the respiratory tract . Inhalation of high concentrations may cause lung oedema (see Notes). Rapid evaporation of the liquid may cause frostbite. The effects may be delayed. Medical observation is indicated. See Notes. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point: -83°C Melting point: -114°C Relative density (water = 1): 1.39 (at -190°C) Density: 2.89 g/l (gas) Solubility in water: reaction Relative vapour density (air = 1): 2.3 ENVIRONMENTAL DATA N O T E S The compound decomposes in the body to hydrogen fluoride, see ICSC 0283 Hydrogen fluoride. Depending on the degree of exposure, periodic medical examination is suggested. 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 inhalation therapy by a doctor or a person authorized by him/her, should be considered. Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. Transport Emergency Card: TEC (R)-20G1TC NFPA Code: H4; F0; R; 0 ADDITIONAL INFORMATION ICSC: 0633 CARBONYL FLUORIDE (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.