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ARSINE ICSC: 0222
Date of Peer Review: March 2001

Arsenic trihydride
Hydrogen arsenide
Arsenic hydride
(cylinder)
CAS # 7784-42-1 AsH3
RTECS # CG6475000 Molecular mass: 77.9
UN # 2188
EC Index # 033-006-00-7
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Extremely flammable. Explosive.
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. 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).
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.
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
Do not eat, drink, or smoke during work.

SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Remove all ignition 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. Do NOT let this chemical enter the environment. Gas-tight chemical protection suit including self-contained breathing apparatus.
EU 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

EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-20G2TF
NFPA Code: H 4; F 4; R 2;
Fireproof if in building. Cool. Ventilation along the floor.
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
ARSINE ICSC: 0222
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:
The substance decomposes on heating and under the influence of light and moisture producing toxic arsenic fumes. Reacts with strong oxidants, causing explosion hazard. May explosively decompose on shock, friction, or concussion.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.05 ppm as TWA; BEI issued; (ACGIH 2004).
MAK: IIb (not established but data is available) (DFG 2004).
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, resulting in destruction of blood cells and kidney failure. The effects may be delayed. Exposure 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: -62C
Melting point: -116C
Solubility in water, ml/100 ml at 20C: 20
Vapour pressure, kPa at 20C: 1043
Relative vapour density (air = 1): 2.7
Flash point: Flammable Gas
Explosive limits, vol% in air: 4.5-78
ENVIRONMENTAL DATA
It is strongly advised that this substance does not enter the environment.
NOTES
The symptoms of poisoning do not become manifest until a few hours or even a few 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 partly updated in October 2005. See sections Occupational Exposure Limits, 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:
        Arsine (PIM 044)