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DICHLOROACETYLENE ICSC: 1426
Date of peer-review: October 2001

Dichloroethyne
CAS # 7572-29-4 C2Cl2
RTECS # AP1080000 Molecular mass: 94.9
UN #
EC # 602-069-00-8
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Explosive. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames, NO sparks, and NO smoking. NO contact with acid(s) or oxidants. NO contact with hot surfaces.
Water spray, foam, carbon dioxide, NO dry chemical.
EXPLOSION Vapour/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT expose to friction or shock.
Combat fire from a sheltered position. In case of fire: keep cylinder cool by spraying with water.
EXPOSURE
STRICT HYGIENE!

Inhalation Headache. Nausea. Vomiting. Sore throat. Dizziness. Facial paralysis, numbness and tremor.
Closed system and ventilation.
Fresh air, rest. Refer for medical attention.
Skin
Protective gloves.
Rinse and then wash skin with water and soap.
Eyes Redness.
Safety spectacles, or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Abdominal pain. (Further see Inhalation).
Do not eat, drink, or smoke during work.
Refer for medical attention. Rinse mouth.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Remove all ignition sources. Do NOT wash away into sewer. (Extra personal protection: filter respirator for organic vapours of low boiling compounds.)
Airtight.
EU Classification
Symbol: E, Xn
R: 2-40-48/20
S: (2-)36/37
UN Classification

EMERGENCY RESPONSE STORAGE

Fireproof. Separated from strong acids and oxidants. Cool. Well closed. Keep in a well-ventilated room.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities © IPCS, CEC 2001

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DICHLOROACETYLENE ICSC: 1426
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
OILY LIQUID, WITH CHARACTERISTIC ODOUR.

CHEMICAL DANGERS:
May decompose explosively on shock, friction, or concussion. May explode on heating. The substance decomposes on heating producing toxic fumes including chlorine. Reacts violently with oxidants and with acids.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (Ceiling value) 0.1 ppm A3 (ACGIH 2001). MAK: Carcinogen category: 2 (DFG 2000).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour.

INHALATION RISK:
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance may cause effects on the nervous system and kidneys, resulting in tissue lesions, impaired functions and kidney impairment.

PHYSICAL PROPERTIES
Boiling point: 32°C (explodes)
Melting point: -66°C
Relative density (water = 1): 1.2
Solubility in water: none
Relative vapour density (air = 1): 3.3
Flash point: see Notes
ENVIRONMENTAL DATA

NOTES
The substance is combustible but no flash point is available in literature. Combustion in a confined space may turn into detonation. The occupational exposure limit value should not be exceeded during any part of the working exposure. The substance is not commercially available, but it is a decomposition product of trichlorethylene, trichloroethane and it is also a by-product of vinylidene chloride.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor 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
© IPCS, CEC 2001
    See Also:
       Toxicological Abbreviations
       Dichloroacetylene  (IARC Summary & Evaluation, Volume 39, 1986)
       Dichloroacetylene  (IARC Summary & Evaluation, Volume 71, 1999)