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HYDROGENICSC: 0001
April 2014
CAS #: 1333-74-0
UN #: 1049
EINECS #: 215-605-7

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Extremely flammable. Many reactions may cause fire or explosion.  Gas/air mixtures are explosive.  NO open flames, NO sparks and NO smoking.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Use non-sparking handtools. Do not handle cylinders with oily hands.  Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out. In other cases extinguish with water spray, powder, carbon dioxide.  In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position. 

 Use appropriate engineering controls.  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Dizziness. Headache. Lethargy. Suffocation.  Use ventilation.  Fresh air, rest. 
Skin ON CONTACT WITH GAS: FROSTBITE.  Cold-insulating gloves.  ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer immediately for medical attention. 
Eyes ON CONTACT WITH GAS: FROSTBITE.  Wear face shield.  ON FROSTBITE: rinse with plenty of water. Refer immediately for medical attention. 
Ingestion      

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Ventilation. Remove all ignition sources. Remove vapour with fine water spray. 

According to UN GHS Criteria

flam;flamecylinder;gas
DANGER
Extremely flammable gas
Contains gas under pressure; may explode if heated 

Transportation
UN Classification
UN Hazard Class: 2.1 

STORAGE
Fireproof. Cool. Ventilation along the floor and ceiling. Separated from oxidizing materials. 
PACKAGING
 
HYDROGEN ICSC: 0001
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
ODOURLESS COLOURLESS COMPRESSED GAS. 

Physical dangers
The gas mixes well with air, explosive mixtures are easily formed. The gas is lighter than air. 

Chemical dangers
Heating may cause violent combustion or explosion. Reacts violently with halogens, oxidizing materials and greases. This generates fire and explosion hazard. Metal catalysts, such as platinum and nickel, greatly enhance these reactions. 

Formula: H2
Molecular mass: 2.0
Boiling point: -253°C
Melting point: -259°C
Relative vapour density (air = 1): 0.07
Flash point: Flammable gas
Auto-ignition temperature: 560°C
Explosive limits, vol% in air: 4-75
Vapour pressure, kPa at 25°C: 165320
Solubility in water, mg/l at 21°C: 1.62 (very poor) 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
Exposure mainly occurs via inhalation. 

Effects of short-term exposure
Asphyxiation. See Notes. Exposure to cold gas could cause frostbite. 

Inhalation risk
On loss of containment this substance can cause suffocation by lowering the oxygen content of the air in confined areas. 

Effects of long-term or repeated exposure
 


Occupational exposure limits
 

ENVIRONMENT
 

NOTES
High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death.
Check oxygen content before entering the area.
Measure hydrogen concentrations with suitable gas detector (a normal flammable gas detector is NOT suitable for the purpose). 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F+; R: 12; S: (2)-9-16-33 

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    See Also:
       Toxicological Abbreviations