International Chemical Safety Cards SULFURYL FLUORIDE ICSC: 1402 Sulfuryl difluoride Sulfuric oxyfluoride SO2F2 Molecular mass: 102,0 (cylinder) ICSC #    1402 CAS #     2699-79-8 RTECS # WT5075000 UN #        2191 EC #         009-015-00-7 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: use appropriate extinguishing media. EXPLOSION In case of fire: keep cylinder cool by spraying with water. EXPOSURE STRICT HYGIENE!  •INHALATION Cough. Sore throat. Nausea. Vomiting. Tremor. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Half-upright position. Refer for medical attention. See Notes.  •SKIN ON CONTACT WITH LIQUID: FROSTBITE. Cold-insulating gloves. ON FROSTBITE: rinse with plenty of water, do NOT remove clothes.  •EYES Redness. 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 NEVER direct water jet on liquid. Remove vapour with fine water spray. Gas-tight chemical protection suit including self-contained breathing apparatus. Fireproof if in building. Keep in a well-ventilated room. Cool. Separated from food and feedstuffs . Do not transport with food and feedstuffs. T symbol R: 23/25-36/37/38 S: 1/2-23-37/39-45 UN Hazard Class: 2.3 SEE IMPORTANT INFORMATION ON BACK ICSC: 1402 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 2001. 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 SULFURYL FLUORIDE ICSC: 1402 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS ODOURLESS COMPRESSED GAS OR COMPRESSED LIQUEFIED GAS PHYSICAL DANGERS: The gas is heavier than air and may accumulate in lowered spaces causing a deficiency of oxygen. CHEMICAL DANGERS: The substance decomposes on heating producing toxic fumes including hydrogen fluoride and sulfur oxides . OCCUPATIONAL EXPOSURE LIMITS: TLV: as TWA 5 ppm (ACGIH 2001). TLV: as STEL 10 ppm (ACGIH 2001). MAK not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation. INHALATION RISK: On loss of containment, a harmful concentration of this gas in the air will be reached very quickly. EFFECTS OF SHORT-TERM EXPOSURE: The substance is severely irritating to the respiratory tract. The substance may cause effects on the central nervous system , resulting in convulsions , respiratory failure. Inhalation of this gas may cause lung oedema (see Notes). Exposure may result in death. Rapid evaporation of the liquid may cause frostbite. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point: -55.3°C Melting point: -135.8°C Density: 3.72 g/l Solubility in water: 4-5 ml/100 ml Vapour pressure, kPa at 21.1°C: 1.7 103 Relative vapour density (air = 1): 3.5 ENVIRONMENTAL DATA N O T E S Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. 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. High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death. Check oxygen content before entering area. There is no odour warning even when toxic concentrations are present. Transport Emergency Card: TEC (R)-20G2T ADDITIONAL INFORMATION ICSC: 1402 SULFURYL FLUORIDE (C) IPCS, CEC, 2001

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.