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ARSINEICSC: 0222
Arsenic trihydride
Hydrogen arsenide
Arsenic hydride
May 2018
CAS #: 7784-42-1
UN #: 2188
EC Number: 232-066-3

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Extremely flammable.  Gas/air mixtures are explosive. Explosive.  NO open flames, NO sparks and NO smoking.  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.  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! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS PREVENTION FIRST AID
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 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 immediately 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 CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Personal protection: gas-tight chemical protection suit including self-contained breathing apparatus. Remove all ignition sources. NEVER direct water jet on liquid. Do NOT let this chemical enter the environment. 

According to UN GHS Criteria

cylinder;gasflam;flameskull;toxiccancer;health haz
DANGER
Contains gas under pressure; may explode if heated
Extremely flammable gas
Fatal if inhaled
May cause cancer
Causes damage to blood 

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

STORAGE
Fireproof if in building. Cool. Ventilation along the floor. 
PACKAGING
 
ARSINE ICSC: 0222
PHYSICAL & CHEMICAL INFORMATION

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. 

Formula: AsH3
Molecular mass: 77.9
Boiling point: -62°C
Melting point: -116°C
Solubility in water, ml/100ml at 20°C: 20 (Very slightly soluble )
Vapour pressure, kPa at 20°C: 1043
Relative vapour density (air = 1): 2.7
Flash point: Flammable gas
Explosive limits, vol% in air: 4.5-78 


EXPOSURE & HEALTH EFFECTS

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

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. The effects may be delayed. Medical observation is indicated. See Notes. Exposure could cause death. 

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
This substance is carcinogenic to humans. 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 0.005 ppm as TWA 

ENVIRONMENT
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.
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
See ICSC 0013. 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations
       Arsine (PIM 044)