International Chemical Safety Cards HYDROGEN CHLORIDE ICSC: 0163 Anhydrous hydrogen chloride Hydrochloric acid, anhydrous HCl Molecular mass: 36.5 (cylinder) ICSC #    0163 CAS #     7647-01-0 RTECS # MW4025000 UN #        1050 EC #         017-002-00-2 April 10, 2000 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Not combustible. In case of fire in the surroundings: use appropriate extinguishing media. EXPLOSION In case of fire: keep cylinder cool by spraying with water. EXPOSURE AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!  •INHALATION Corrosive. Burning sensation. Cough. Laboured breathing. Shortness of breath. Sore throat. 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. Corrosive. Serious skin burns. Pain. Cold-insulating gloves. Protective clothing. First rinse with plenty of water, then remove contaminated clothes and rinse again. Refer for medical attention.  •EYES Corrosive. Pain. Blurred vision. Severe deep burns. Safety goggles 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. Remove gas with fine water spray. Personal protection: complete protective clothing including self-contained breathing apparatus. Separated from combustible and reducing substances, strong oxidants, strong bases, metals . Keep in a well-ventilated room. Cool. Dry. T symbol C symbol R: 23-35 S: 1/2-9-26-36/37/39-45 UN Hazard Class: 2.3 UN Subsidiary Risks: 8 SEE IMPORTANT INFORMATION ON BACK ICSC: 0163 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 CHLORIDE ICSC: 0163 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 oxidants forming toxic gas (chlorine - see ICSC 0126). Attacks many metals in the presence of water forming flammable/explosive gas (hydrogen - see ICSC0001). OCCUPATIONAL EXPOSURE LIMITS: TLV: 2 ppm; (Ceiling value); A4 (not classifiable as a human carcinogen); (ACGIH 2004). MAK: 2 ppm, 3.0 mg/m³; Peak limitation category: I(2); Pregnancy risk group: C; (DFG 2004). OSHA PEL: C 5 ppm (7 mg/m3) NIOSH REL: C 5 ppm (7 mg/m3) NIOSH IDLH: 50 ppm 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: Rapid evaporation of the liquid may cause frostbite. The substance is corrosive to the eyes, the skin and the respiratory tract. Inhalation of high concentrations of the gas may cause pneumonitis and lung oedema, resulting in reactive airways dysfunction syndrome (RADS) (see Notes). The effects may be delayed. Medical observation is indicated. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The substance may have effects on the lungs , resulting in chronic bronchitis. The substance may have effects on the teeth, resulting in erosion. PHYSICAL PROPERTIES Boiling point: -85°C Melting point: -114°C Density: 1.00045 g/l (gas) Solubility in water, g/100 ml at 30°C: 67 Relative vapour density (air = 1): 1.3 Octanol/water partition coefficient as log Pow: 0.25 ENVIRONMENTAL DATA N O T E S The applying 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 inhalation therapy by a doctor or a person authorized by him/her, should be considered. 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 numbers: 2186 (refridgerated liquid) hazard class: 2.3; subsidiary hazard: 8; 1789 (hydrochloric acid) hazard class: 8, pack group II or III. Aqueous solutions may contain up to 38% hydrogen chloride. Card has been partly updated in April 2005. See sections Occupational Exposure Limits, Emergency Response. Transport Emergency Card: TEC (R)-20S1050 NFPA Code: H 3; F 0; R 1; ADDITIONAL INFORMATION ICSC: 0163 HYDROGEN 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.