PROPYNE 0560
November 1997
CAS No: 74-99-7 Allylene
RTECS No: UK4250000 Methyl acetylene
UN No: 1954 (cylinder)
C3H4 / CH3-C=CH
Molecular mass: 40.07
TYPES OF
ACUTE HAZARDS/SYMPTOMS PREVENTION FIRST AID/FIRE FIGHTING
HAZARD/
EXPOSURE
FIRE Extremely flammable. NO open flames, NO sparks, and NO Shut off supply; if not possible and no risk
smoking. to surroundings, let the fire burn itself out;
in other cases extinguish with water
spray.
EXPLOSION Gas/air mixtures are explosive. Closed system, ventilation, In case of fire: keep cylinder cool by
explosion-proof electrical equipment and spraying with water. Combat fire from a
lighting. Prevent build-up of electrostatic sheltered position.
charges (e.g., by grounding) if in liquid
state. Use non-sparking handtools.
Prevent build-up of electrostatic charges
(e.g., by grounding).
EXPOSURE
Inhalation Dizziness. Headache. Nausea. Local exhaust or breathing protection. Fresh air, rest. Artificial respiration if
Unconsciousness. indicated. Refer for medical attention. See
Notes.
Skin ON CONTACT WITH LIQUID: Cold-insulating gloves. ON FROSTBITE: rinse with plenty of
FROSTBITE. water, do NOT remove clothes.
Eyes Face shield. First rinse with plenty of water for several
minutes (remove contact lenses if easily
possible), then take to a doctor.
Ingestion
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Ventilation. Remove all ignition UN classification
sources. NEVER direct water jet on liquid. (Extra personal UN Hazard Class: 2.1
protection: chemical protection suit including self-contained
breathing apparatus).
EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-20G41 Fireproof. Cool.
NFPA Code: H2; F4; R2
Prepared in the context of cooperation between the International
IPCS Programme on Chemical Safety and the European Commission 漏
IPCS 2006
International
Programme on
SEE IMPORTANT INFORMATION ON THE BACK.
Chemical Safety
0560 PROPYNE
IMPORTANT DATA
Physical State; Appearance Routes of exposure
COLOURLESS COMPRESSED GAS, WITH CHARACTERISTIC ODOUR. The substance can be absorbed into the body by inhalation.
Physical dangers Inhalation risk
The gas is heavier than air and may travel along the ground; distant On loss of containment this gas can cause suffocation by lowering the
ignition possible. As a result of flow, agitation, etc., electrostatic charges oxygen content of the air in confined areas.
can be generated.
Effects of short-term exposure
Chemical dangers The substance irritates the respiratory tract. Rapid evaporation of the
The substance decomposes on heating and increasing pressure, causing liquid may cause frostbite. Exposure could cause lowering of
fire and explosion hazard. consciousness.
Occupational exposure limits
TLV: 1000 ppm; 1640 mg/m3 (ACGIH 1996).
MAK: IIb (not established but data is available) (DFG 2006.
PHYSICAL PROPERTIES
Boiling point: -23.2/C Vapour pressure, kPa at 20/C: 521
Melting point: -102.7/C Relative vapour density (air = 1): 1.4
Relative density (water = 1): 0.70 Flash point: Flammable Gas
Solubility in water, g/100 ml: 0.36 Explosive limits, vol% in air: 2.4-11.7
ENVIRONMENTAL DATA
NOTES
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.
Card has been partially updated in August 2007: see Occupational Exposure Limits.
ADDITIONAL INFORMATION
Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible
LEGAL NOTICE for the use which might be made of this information
漏IPCS 2006
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