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ACETYLENE
(cylinder)
ICSC: 0089
Peer-Review Status: 05.08.2003 Validated
Ethine
Ethyne 
CAS #: 74-86-2 RTECS #: AO9600000
UN #: 1001
EC #: 601-015-00-0
EINECS #: 200-816-9
    Formula: C2H2
Molecular mass: 26.0

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Extremely flammable.  NO open flames, NO sparks and NO smoking.  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. 
EXPLOSION Gas/air mixtures are explosive.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding). Use non-sparking handtools. Flame arrester to prevent flash-back from burner to cylinder.  In case of fire: keep cylinder cool by spraying with water. 
 
EXPOSURE      
Inhalation Dizziness. Lethargy. Headache. Suffocation.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Artificial respiration may be needed. Refer for medical attention. 
Skin      
Eyes     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
PACKAGING & LABELLING
Remove all ignition sources. Evacuate danger area! Consult an expert! Personal protection: self-contained breathing apparatus. Ventilation.  Special insulated cylinder. 
EC Classification
Symbol: F+; R: 5-6-12; S: (2)-9-16-33 
UN Classification
UN Hazard Class: 2.1 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H1; F4; R3.  Fireproof. See Chemical Dangers. Cool. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS GAS DISSOLVED IN ACETONE UNDER PRESSURE. 

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

Chemical dangers
The substance may polymerize. Decomposes on heating and increasing pressure. This generates fire and explosion hazard. The substance is a strong reducing agent. It reacts violently with oxidants and fluorine or chlorine under influence of light. This generates fire and explosion hazard. Reacts with copper, silver, mercury and their salts. This produces shock-sensitive compounds (acetylides). 

Occupational exposure limits
TLV (SIMPLE-ASPHYXIANT): (ACGIH 2003).
MAK (not established):. 

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

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

Effects of short-term exposure
Asphyxiation. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Sublimation point: -84°C
Solubility in water, g/100ml at 20°C: 0.12
Vapour pressure, kPa at 20°C: 4460
Relative vapour density (air = 1): 0.907
Flash point: Flammable gas
Auto-ignition temperature: 305°C
Explosive limits, vol% in air: 2.5-100
Octanol/water partition coefficient as log Pow: 0.37  
 

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
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations