International Chemical Safety Cards PHOSPHINE ICSC: 0694 PHOSPHINE Phosphorus trihydride Hydrogen phosphide (cylinder) PH3 Molecular mass: 34.00 CAS # 7803-51-2 RTECS # SY7525000 ICSC # 0694 UN # 2199 TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Extremely flammable. Gives off irritating or toxic fumes (or gases) in a fire. NO open flames, NO sparks, and NO smoking. NO contact with hot surfaces. 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. In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position. EXPOSURE STRICT HYGIENE! IN ALL CASES CONSULT A DOCTOR! INHALATION Cough. Nausea. Burning sensation. Diarrhoea. Abdominal pain. Headache. Dizziness. Dullness. Ataxia. Pain and tightness in the chest. Tremors. Shortness of breath. Vomiting. Convulsions. Breathing protection. Fresh air, rest. Half-upright position. Artificial respiration if indicated. 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. Refer for medical attention. EYES 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 (extra personal protection: chemical protection suit including self-contained breathing apparatus). Fireproof. UN Hazard Class: 2.3 UN Subsidiary Risks: 2.1 SEE IMPORTANT INFORMATION ON BACK ICSC: 0694 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 PHOSPHINE ICSC: 0694 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS COMPRESSED LIQUEFIED GAS PHYSICAL DANGERS: The gas is heavier than air. CHEMICAL DANGERS: The substance decomposes on heating or on burning producing toxic fumes including phosphorous oxides. Reacts violently with air, oxygen, oxidants such as chlorine and nitrogen oxides, metal nitrates, halogens and other many substances, causing fire and explosion hazard. Attacks many metals. OCCUPATIONAL EXPOSURE LIMITS (OELs): TLV (as TWA): 0.3 ppm; 0.42 mg/m3; (as STEL): 1 ppm; 1.4 mg/m3 (ACGIH 1997). OSHA PEL: TWA 0.3 ppm (0.4 mg/m3) NIOSH REL: TWA 0.3 ppm (0.4 mg/m3) ST 1 ppm (1 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: The substance irritates severely the respiratory tract. Inhalation of the gas may cause lung oedema (see Notes). Rapid evaporation of the liquid may cause frostbite. The substance may cause effects on the central nervous system, cardiovascular system, heart, gastrointestinal tract, liver and kidneys , resulting in impaired functions. Exposure above the OEL may result in unconsciousness or death. The effects may be delayed. Medical observation is indicated. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Chronic poisoning may cause toothache, swelling of the jaw, phossy jaw, spontaneous fractures of bones and anaemia. Effects are cumulative. PHYSICAL PROPERTIES Boiling point: -87.7°C Melting point: -133°C Relative density (water = 1): 0.8 Solubility in water, ml/100 ml at 17°C: 26 Vapour pressure, kPa at 20°C: 4186 Relative vapour density (air = 1): 1.17 Flash point: Flammable Gas Auto-ignition temperature: 38°C Explosive limits, vol% in air: 1.8-? ENVIRONMENTAL DATA N O T E S The technical product often ignites spontaneously at room temperature because of the presence of other phosphorus hydrides (especially P2H4) as impurities. Odourless when pure at concentrations up to 200 ppm, a highly toxic level. Technical product has a garlic-like odour due to impurities. 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. 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. Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. Transport Emergency Card: TEC (R)-20G43 NFPA Code: H3; F4; R2. ADDITIONAL INFORMATION ICSC: 0694 PHOSPHINE © 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.