International Chemical Safety Cards ARSINE ICSC: 0222 ARSINE Arsenic trihydride Hydrogen arsenide (cylinder) AsH3 Molecular mass: 77.9 CAS # 7784-42-1 RTECS # CG6475000 ICSC # 0222 UN # 2188 EC # 033-002-00-5 TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Extremely flammable. NO open flames, NO sparks, and NO smoking. Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with powder, carbon dioxide. EXPLOSION Gas/air mixtures are explosive. Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding) if in liquid state. In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position. EXPOSURE AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR! INHALATION Abdominal pain. Confusion. Dizziness. Headache. Nausea. Shortness of breath. Vomiting. Weakness. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Half-upright position. Refer for medical attention. SKIN ON CONTACT WITH LIQUID: FROSTBITE. Cold-insulating gloves. Protective clothing. ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Rinse skin with plenty of water or shower. Refer for medical attention. EYES ON CONTACT WITH LIQUID: FROSTBITE. 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 SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Evacuate danger area! Consult an expert! Ventilation. Remove all ignitions sources. Close cylinder or remove to open and safe place. If in liquid state: do NOT wash away into sewer, NEVER direct water jet on liquid (extra personal protection: self-contained breathing apparatus). Fireproof if in building. Separated from strong oxidants (see Chemical Dangers). Cool. Ventilation along the floor. Store in glass lined containers. T symbol R: 23/25 S: (1/2-)20/21-28-45 Note: A UN Hazard Class: 2.3 UN Subsidiary Risks: 2.1 SEE IMPORTANT INFORMATION ON BACK ICSC: 0222 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993 No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and IDLH values.

International Chemical Safety Cards ARSINE ICSC: 0222 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS COMPRESSED LIQUEFIED GAS , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: The gas is heavier than air and may travel along the ground; distant ignition possible. As a result of flow, agitation, etc., electrostatic charges can be generated. CHEMICAL DANGERS: The substance decomposes on heating and under influence of light and moisture producing toxic arsenic fumes. Reacts violently with strong oxidants, fluorine, chlorine, nitric acid, nitrogen trichloride, causing fire and explosion hazard. OCCUPATIONAL EXPOSURE LIMITS (OELs): TLV: 0.05 ppm; 0.16 mg/m3 (ACGIH 1993-1994). OSHA PEL: TWA 0.05 ppm (0.2 mg/m3) NIOSH REL: Ca C 0.002 mg/m3 15-minute See Appendix A NIOSH IDLH: Potential occupational carcinogen 3 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: Inhalation of gas may cause lung oedema (see Notes). Rapid evaporation of the liquid may cause frostbite. The substance may cause effects on the blood and kidneys , resulting in lesions of blood cells and kidney impairment. Exposure far above OEL may result in death. Medical observation is indicated. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: This substance is carcinogenic to humans. PHYSICAL PROPERTIES Boiling point: -62°C Melting point: -116°C Solubility in water, g/100 ml: 0.07 Vapour pressure, kPa at 20°C: 1043 Relative vapour density (air = 1): 2.7 Flash point: Flammable Gas Explosive limits, vol% in air: 4.5-78% ENVIRONMENTAL DATA This substance may be hazardous to the environment. N O T E S 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. Do NOT take working clothes home. Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. Transport Emergency Card: TEC (R)-20G12 NFPA Code: H 4; F 4; R 2; ADDITIONAL INFORMATION ICSC: 0222 ARSINE © IPCS, CEC, 1993

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 IDLH values.