International Chemical Safety Cards HYDROGEN BROMIDE ICSC: 0282 Hydrobromic acid HBr Molecular mass: 80.9 (cylinder) ICSC #    0282 CAS #     10035-10-6 RTECS # MW3850000 UN #        1048 (anhydrous) EC #         035-002-00-0 March 15, 2001 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. In case of fire in the surroundings: all extinguishing agents allowed. EXPLOSION Risk of fire and explosion on contact with metals as a result of hydrogen formation. In case of fire: cool cylinder by spraying with water but avoid contact of the substance with water. EXPOSURE AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!  •INHALATION Burning sensation. Cough. Sore throat. Laboured breathing. Shortness of breath. Symptoms may be delayed (see Notes). Ventilation, local exhaust, or breathing protection. Fresh air, rest. Half-upright position. Refer for medical attention.  •SKIN ON CONTACT WITH LIQUID: FROSTBITE. Redness. Pain. Blisters. Cold-insulating gloves. Protective clothing. ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention.  •EYES Redness. Pain. Severe deep burns. 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 gas with fine water spray. Gas-tight chemical protection suit including self-contained breathing apparatus. Separated from incompatible materials . See Chemical Dangers. Cool. Dry. Ventilation along the floor. C symbol R: 35-37 S: 1/2-7/9-26-45 UN Hazard Class: 2.3 UN Subsidiary Risks: 8 SEE IMPORTANT INFORMATION ON BACK ICSC: 0282 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 HYDROGEN BROMIDE ICSC: 0282 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 solution in water is a strong acid, it reacts violently with bases and is corrosive. Reacts violently with strong oxidants and many organic compounds causing fire and explosion hazard. Attacks many metals forming flammable/explosive gas (hydrogen - see ICSC 0001). OCCUPATIONAL EXPOSURE LIMITS: TLV: 3 ppm; (Ceiling value); (ACGIH 2000). OSHA PEL: TWA 3 ppm (10 mg/m3) NIOSH REL: C 3 ppm (10 mg/m3) NIOSH IDLH: 30 ppm 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 corrosive to the eyes, the skin and the respiratory tract. Inhalation of the gas may cause lung oedema (see Notes). Rapid evaporation of the liquid may cause frostbite. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point: -67°C Melting point: -87°C Relative density (water = 1): 1.8 Solubility in water, g/100 ml at 20°C: 193 Vapour pressure, kPa at 20°C: 2445 Relative vapour density (air = 1): 2.8 ENVIRONMENTAL DATA 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 are therefore essential. Immediate administration of an appropriate spray, by a doctor or a person authorized by him/her, should be considered. The odour warning when the exposure limit value is exceeded is insufficient. 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. Other UN number: 1788 Hydrobromic acid (solution), hazard class 8. Transport Emergency Card: TEC (R)-668 NFPA Code: H 3; F 0; R 0; ADDITIONAL INFORMATION ICSC: 0282 HYDROGEN BROMIDE (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.