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PHOSPHINEICSC: 0694
April 2013
CAS #: 7803-51-2Phosphorus trihydride
Hydrogen phosphide
UN #: 2199
EINECS #: 232-260-8

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Extremely flammable. May ignite spontaneously on contact with air. Gives off irritating or toxic fumes (or gases) in a fire.  Gas/air mixtures are explosive.  NO open flames, NO sparks and NO smoking. NO contact with hot surfaces.  Closed system, ventilation, explosion-proof electrical equipment and lighting.  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.  In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position. 

 AVOID ALL CONTACT! FIRST AID: USE PERSONAL PROTECTION. IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Headache. Dizziness. Nausea. Diarrhoea. Chest pain. Shortness of breath. Irregular heartbeat. Convulsions. Unconsciousness.  Use closed system or ventilation.  Fresh air, rest. Half-upright position. Administration of oxygen may be needed. Artificial respiration may be needed. Refer immediately 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 ON CONTACT WITH LIQUID: FROSTBITE.  Wear 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 refer for medical attention. 
Ingestion   Wash hands before eating.   

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Ventilation. Personal protection: chemical protection suit including self-contained breathing apparatus. 

According to UN GHS Criteria

flam;flamecylinder;gasskull;toxiccorr
DANGER
Extremely flammable gas
Contains gas under pressure; may explode if heated
Fatal if inhaled
Causes severe skin burns and eye damage 

Transportation
UN Classification
UN Hazard Class: 2.3; UN Subsidiary Risks: 2.1 

STORAGE
Fireproof. Keep in a well-ventilated room. 
PACKAGING
 
PHOSPHINE ICSC: 0694
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS COMPRESSED LIQUEFIED GAS. 

Physical dangers
The gas is heavier than air and may travel along the ground; distant ignition possible. 

Chemical dangers
Decomposes on heating and on burning. This produces toxic fumes including phosphorus oxides. Reacts violently with air, oxygen, oxidants such as chlorine oxides, nitrogen oxides, metal nitrates, halogens and many other substances. This generates fire and explosion hazard. Attacks many metals. 

Formula: PH3
Molecular mass: 34.00
Boiling point: -87.7°C
Melting point: -133°C
Relative density (water = 1): 0.8
Density (gas): 1.53 kg/m³
Solubility in water, ml/100ml at 17°C: 26 (very poor)
Vapour pressure, kPa at 20°C: 3488
Relative vapour density (air = 1): 1.18
Flash point: Flammable gas
Auto-ignition temperature: 38°C
Explosive limits, vol% in air: 1.6 - 100 (estimated) 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation. 

Effects of short-term exposure
The substance is severely irritating to the respiratory tract. Inhalation of this 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. This may result in impaired functions. Exposure above the OEL could cause unconsciousness and death. Medical observation is indicated. 

Inhalation risk
A harmful concentration of this gas in the air will be reached very quickly on loss of containment. 

Effects of long-term or repeated exposure
Non-specific complaints like gastrointestinal disorders, headache, nausea etc. may occur. 


Occupational exposure limits
TLV: 0.3 ppm as TWA; 1 ppm as STEL.
MAK: 0.14 mg/m3, 0.1 ppm; peak limitation category: II(2); pregnancy risk group: C.
EU-OEL: 0.14 mg/m3, 0.1 ppm as TWA; 0.28 mg/m3, 0.2 ppm as STEL 

ENVIRONMENT
This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal. 

NOTES
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
The technical product often ignites spontaneously at room temperature because of the presence of other phosphorus hydrides, especially diphosphine (CAS:13445-5-6) as impurities.
Odourless when pure at concentrations up to 200 ppm (278 mg/m3) (a highly toxic level).
Technical product has odour of garlic or decaying fish due to impurities.
The odour warning when the exposure limit value is exceeded is insufficient.
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 by an authorized person, should be considered. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F+, T+, N; R: 12-17-26-34-50; S: (1/2)-28-36/37-45-61-63 

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    See Also:
       Toxicological Abbreviations
       Phosphine (HSG 28, 1989)
       Phosphine (PIM 865)