International Chemical Safety Cards

ACETYLENE ICSC: 0089
ACETYLENE
Ethine
Ethyne
(cylinder)
C2H2
Molecular mass: 26.0
CAS # 74-86-2
RTECS # AO9600000
ICSC # 0089
UN # 1001 (dissolved)
EC # 601-015-00-0
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 reduced-sparking handtools. Use flame arrester to prevent flash-back from burner to cylinder.
In case of fire: keep cylinder cool by spraying with water.
EXPOSURE


  • INHALATION
  • Dizziness. Dullness.
    Ventilation, local exhaust, or breathing protection.
    Fresh air, rest. Refer for medical attention.
  • SKIN
  • ON CONTACT WITH LIQUID: FROSTBITE.
    Cold-insulating gloves.
    Rinse with plenty of water, do NOT remove clothes.
  • EYES

  • Safety goggles or face shield.
    First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
  • INGESTION

  • Do not eat, drink, or smoke during work.

    SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
    Evacuate danger area! Consult an expert! Ventilation (extra personal protection: self-contained breathing apparatus).
    Fireproof. Separated from: see Chemical Dangers. Cool.
    Special insulated cylinder.
    F+ symbol
    R: 5-6-12
    S: 9-16-33
    UN Haz Class: 2.1
    SEE IMPORTANT INFORMATION ON BACK
    ICSC: 0089 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

    International Chemical Safety Cards

    ACETYLENE ICSC: 0089

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    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 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 (OELs):
    TLV not established.
    MAK not established.


    ROUTES OF EXPOSURE:
    The substance can be absorbed into the body by inhalation.

    INHALATION RISK:
    On loss of containment this gas can cause suffocation by lowering the oxygen content of the air in confined areas.

    EFFECTS OF SHORT-TERM EXPOSURE:
    Rapid evaporation of the liquid may cause frostbite. The substance may cause effects on the nervous system.


    PHYSICAL
    PROPERTIES
    Boiling point: -85C
    Melting point: -81C
    Solubility in water, g/100 ml at 20C: 1.66
    Vapour pressure, kPa at 20C: 4460
    Relative vapour density (air = 1): 0.907
    Flash point: Flammable Gas
    Auto-ignition temperature: 299C
    Explosive limits, vol% in air: 2.5-82
    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.
    Transport Emergency Card: TEC (R)-20G25
    NFPA Code: H 1; F 4; R 3;
    ADDITIONAL INFORMATION


    ICSC: 0089 ACETYLENE
    © IPCS, CEC, 1993
    IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use.