IPCS INCHEM Home
ARSINE
(cylinder)
ICSC: 0222
Peer-Review Status: 13.03.2001 Validated
Arsenic trihydride
Hydrogen arsenide
Arsenic hydride
CAS #: 7784-42-1 RTECS #: CG6475000
UN #: 2188
EC #: 033-006-00-7
EINECS #: 232-066-3
    Formula: AsH3
Molecular mass: 77.9

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. Explosive.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding) if in liquid state. Do NOT expose to friction or shock.  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. Symptoms may be delayed. See Notes.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. 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 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   Do not eat, drink, or smoke during work.   

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Remove all ignition sources. NEVER direct water jet on liquid. Do NOT let this chemical enter the environment. Personal protection: gas-tight chemical protection suit including self-contained breathing apparatus.   
EC Classification
Symbol: F+, T+, N; R: 12-26-48/20-50/53; S: (1/2)-9-16-28-33-36/37-45-60-61 
UN Classification
UN Hazard Class: 2.3; UN Subsidiary Risks: 2.1 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-20G2TF.
NFPA Code: H4; F4; R2. 
Fireproof if in building. Cool. Ventilation along the floor. 

IMPORTANT DATA
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
Decomposes on heating and under the influence of light and moisture. This produces toxic arsenic fumes. Reacts with strong oxidants. This generates explosion hazard. May decompose explosively on shock, friction or concussion. 

Occupational exposure limits
TLV: 0.05ppm as TWA; (ACGIH 2005); notice of intended change (see Notes). 

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 may cause effects on the blood. This may result in destruction of blood cells and kidney failure. The effects may be delayed. Exposure could cause death. Medical observation is indicated. 

Effects of long-term or repeated exposure
This substance is carcinogenic to humans. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: -62°C
Melting point: -116°C
Solubility in water, ml/100ml at ml at 20°C°C:
Vapour pressure, kPa at 20°C:
Relative vapour density (air = 1): 2.7
Flash point: Flammable gas
Explosive limits, vol% in air: (at 4.5-78°C) 
It is strongly advised not to let the chemical enter into the environment. 

NOTES
The symptoms of poisoning do not become manifest until a few hours or even days have passed.
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
Also consult ICSC 0013 Arsenic.
Card has been partially updated in October 2005: see Occupational Exposure Limits; Emergency Response.
TLV: Intended change: 0.005 ppm A4 (not classifiable as a human carcinogen). 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.
    See Also:
       Toxicological Abbreviations
       Arsine (PIM 044)