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PHOSPHINE ICSC: 0694
Date of Peer Review: October 1997

Phosphorus trihydride
Hydrogen phosphide
CAS # 7803-51-2 PH3
RTECS # SY7525000 Molecular mass: 34.00
UN # 2199
EC Index # 015-181-00-1
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 may be needed. 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 PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Ventilation. Personal protection: chemical protection suit including self-contained breathing apparatus.
EU Classification
Symbol: F+, T+, N
R: 12-17-26-34-50
S: (1/2-)-28-36/37-45-61-63
UN Classification
UN Hazard Class: 2.3
UN Subsidiary Risks: 2.1

EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-20G2TF
NFPA Code: H3; F4; R2.
Fireproof.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
PHOSPHINE ICSC: 0694
IMPORTANT DATA
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 phosphorus 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:
TLV: 0.3 ppm as TWA, 1 ppm as STEL; (ACGIH 2005).
MAK: 0.1 ppm, 0.14 mg/m; Peak limitation category: I(1); Pregnancy risk group: IIc; (DFG 2005).
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 is severely irritating to 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: -87.7C
Melting point: -133C
Relative density (water = 1): 0.8
Solubility in water, ml/100 ml at 17C: 26
Vapour pressure, kPa at 20C: 4186
Relative vapour density (air = 1): 1.17
Flash point: Flammable Gas
Auto-ignition temperature: 38C
Explosive limits, vol% in air: 1.8-?
ENVIRONMENTAL DATA

NOTES
The technical product often ignites spontaneously at room temperature because of the presence of other phosphorus hydrides (especially P_2H_4) 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 inhalation therapy 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. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, EU classification, Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005
See Also:
        Phosphine (PDS)
        Phosphine (PIM 865)
        Phosphine and selected metal phosphides (EHC 73, 1988)