International Chemical Safety Cards DIBROMODIFLUOROMETHANE ICSC: 1419 Difluorodibromomethane Fluorocarbon 12-B2 CBr2F2 Molecular mass: 209.8 ICSC #    1419 CAS #     75-61-6 RTECS # PA7525000 UN #        1941 November 27, 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: use appropriate extinguishing media. EXPLOSION EXPOSURE  •INHALATION Cough. Sore throat. Laboured breathing. Shortness of breath. Confusion. Drowsiness. Unconsciousness. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention. See Notes.  •SKIN Protective gloves. Rinse and then wash skin with water and soap.  •EYES Safety spectacles. 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 Ventilation. Do NOT let this chemical enter the environment. See Chemical Dangers. R: S: UN Hazard Class: 9 UN Packing Group: III SEE IMPORTANT INFORMATION ON BACK ICSC: 1419 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 DIBROMODIFLUOROMETHANE ICSC: 1419 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS GAS OR LIQUID , WITH CHARACTERISTIC ODOUR. 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 contact with hot surfaces or flames producing toxic and corrosive gases including hydrogen bromide , hydrogen fluoride . Reacts with alkali metals , powdered aluminium , magnesium and zinc . OCCUPATIONAL EXPOSURE LIMITS: TLV: 100 ppm as TWA; (ACGIH 2003). MAK: 100 ppm, 870 mg/m³; Peak limitation category: II(2); (DFG 2003). 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 irritating to the respiratory tract . Inhalation of the substance at high levels may cause lung oedema (see Notes). The substance may cause effects on the central nervous system . Exposure could cause lowering of consciousness. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point: 22.8°C Melting point: -101.1°C Density: 8.7 kg/m3 Density: 2.27 g/cm3 (for gas) (for liquid) Solubility in water: none Vapour pressure, kPa at 20°C: 83 Relative vapour density (air = 1): 7.2 Octanol/water partition coefficient as log Pow: 1.99 ENVIRONMENTAL DATA This substance may be hazardous in the environment; special attention should be given to its impact on the ozone layer. N O T E S Check oxygen content before entering area. 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. Chlorofluorocarbons are known to cause effect on the cardiovascular system. Freon 12-B2 and Halon 1202 are trade names. ADDITIONAL INFORMATION ICSC: 1419 DIBROMODIFLUOROMETHANE (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.