ACETYLENE 0089
May 2003
Ethine
CAS No: 74-86-2
Ethyne
RTECS No: AO9600000
(cylinder)
UN No: 1001
C2H2
EC No: 601-015-00-0
Molecular mass: 26.0
TYPES OF
ACUTE HAZARDS/SYMPTOMS PREVENTION FIRST AID/FIRE FIGHTING
HAZARD/
EXPOSURE
Extremely flammable. NO open flames, NO sparks, and Shut off supply; if not possible and
FIRE
NO smoking. no risk to surroundings, let the fire
burn itself out; in other cases
extinguish with powder, carbon
dioxide.
Gas/air mixtures are explosive. Closed system, ventilation, In case of fire: keep cylinder cool by
EXPLOSION
explosion-proof electrical equipment spraying with water.
and lighting. Prevent build-up of
electrostatic charges (e.g., by
grounding). Use non-sparking
handtools. Use flame arrester to
prevent flash-back from burner to
cylinder.
EXPOSURE
Dizziness. Dullness. Headache. Ventilation, local exhaust, or Fresh air, rest. Artificial respiration
Inhalation
Suffocation. breathing protection. may be needed. Refer for medical
attention.
Skin
First rinse with plenty of water for
Eyes
several minutes (remove contact
lenses if easily possible), then take
to a doctor.
Do not eat, drink, or smoke during
Ingestion
work.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert! F+ Symbol Special insulated cylinder.
Ventilation. Remove all ignition sources. (Extra R: 5-6-12
personal protection: self-contained breathing S: (2-)9-16-33
apparatus). UN Hazard Class: 2.1
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-20S1001 Fireproof. Separated from - see Chemical Dangers. Cool.
NFPA Code: H 1; F 4; R 3
Prepared in the context of cooperation between the International
IPCS Programme on Chemical Safety and the European Commission
International 漏 IPCS 2002
Programme on
Chemical Safety SEE IMPORTANT INFORMATION ON THE BACK.
0089 ACETYLENE
IMPORTANT DATA
Physical State; Appearance Routes of exposure
COLOURLESS GAS DISSOLVED IN ACETONE UNDER The substance can be absorbed into the body by inhalation.
PRESSURE.
Inhalation risk
Physical dangers On loss of containment this gas can cause suffocation by
The gas mixes well with air, explosive mixtures are formed lowering the oxygen content of the air in confined areas.
easily.
Effects of short-term exposure
Chemical dangers Suffocation.
The substance may polymerize due to heating. The substance
decomposes on heating and increasing pressure, causing fire
and explosion hazard. The substance is a strong reducing agent
and reacts violently with oxidants and with fluorine or chlorine
under influence of light, causing fire and explosion hazard.
Reacts with copper, silver, and mercury or their salts, forming
shock-sensitive compounds (acetylides).
Occupational exposure limits
TLV: Simple asphyxiant, (ACGIH 2003).
MAK not established.
PHYSICAL PROPERTIES
Boiling point: -85掳C Flash point: Flammable Gas
Melting point: -81掳C Auto-ignition temperature: 305掳C
Solubility in water, g/100 ml at 20掳C: 0.12 Explosive limits, vol% in air: 2.5-100
Vapour pressure, kPa at 20掳C: 4460 Octanol/water partition coefficient as log Pow: 0.37
Relative vapour density (air = 1): 0.907
ENVIRONMENTAL DATA
NOTES
Piping material for this gas must not contain over 63% of copper.
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 technical product may contain impurities which alter the health effects; for further information see ICSC0694 Phosphine.
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 2002
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