|CAS #: 74-99-7|
| UN #: 1954
|EC Number: 200-828-4
|ACUTE HAZARDS||PREVENTION||FIRE FIGHTING|
|FIRE & EXPLOSION||Extremely flammable. Gas/air mixtures are 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. Use non-sparking handtools. Prevent build-up of electrostatic charges (e.g., by grounding).||Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out. In other cases extinguish with water spray. In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position.|
|Inhalation||Dizziness. Headache. Nausea. Unconsciousness.||Use local exhaust or breathing protection.||Fresh air, rest. Artificial respiration may be needed. Refer for medical attention. See Notes.|
|Skin||ON CONTACT WITH LIQUID: FROSTBITE.||Cold-insulating gloves.||ON FROSTBITE: rinse with plenty of water, do NOT remove clothes.|
|Eyes||Wear face shield.||First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.|
|SPILLAGE DISPOSAL||CLASSIFICATION & LABELLING|
|Evacuate danger area! Personal protection: chemical protection suit including self-contained breathing apparatus. Ventilation. Remove all ignition sources. NEVER direct water jet on liquid.||
According to UN GHS Criteria
|PHYSICAL & CHEMICAL INFORMATION|
Physical State; Appearance
Formula: C3H4 / CH3-C=CH
|EXPOSURE & HEALTH EFFECTS|
Routes of exposure
Effects of short-term exposure
Effects of long-term or repeated exposure
|OCCUPATIONAL EXPOSURE LIMITS|
|TLV: 1000 ppm as TWA|
|High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death.
Check oxygen content before entering area.
After use for welding, turn valve off; regularly check tubing, etc., and test for leaks with soap and water.
The measures mentioned in section PREVENTION are applicable to production, filling of cylinders, and storage of the gas.
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See Also: Toxicological Abbreviations