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DICHLOROACETYLENEICSC: 1426
DichloroethyneOctober 2001
CAS #: 7572-29-4

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Gives off irritating or toxic fumes (or gases) in a fire.  Vapour/air mixtures are explosive. Explosive.  NO open flames, NO sparks and NO smoking. NO contact with acids or oxidizing agents. NO contact with hot surfaces.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT expose to friction or shock.  Use water spray, foam, carbon dioxide.  Combat fire from a sheltered position. In case of fire: keep cylinder cool by spraying with water. 

 STRICT HYGIENE!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Headache. Nausea. Vomiting. Sore throat. Dizziness. Facial paralysis, numbness and tremor.  Use closed system or ventilation.  Fresh air, rest. Refer for medical attention. 
Skin   Protective gloves.  Rinse and then wash skin with water and soap. 
Eyes Redness.  Wear 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 refer for medical attention. 
Ingestion Abdominal pain. Further see Inhalation.  Do not eat, drink, or smoke during work.  Refer for medical attention . Rinse mouth. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Remove all ignition sources. Do NOT wash away into sewer. Personal protection: filter respirator for organic vapours of low boiling point adapted to the airborne concentration of the substance. 

According to UN GHS Criteria

 

Transportation
UN Classification
 

STORAGE
Fireproof. Separated from strong acids and oxidants. Cool. Well closed. Keep in a well-ventilated room. 
PACKAGING
Airtight. 
DICHLOROACETYLENE ICSC: 1426
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
OILY LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
 

Chemical dangers
May decompose explosively on shock, friction or concussion. May explode on heating. Decomposes on heating. This produces toxic fumes including chlorine. Reacts violently with oxidants and acids. 

Formula: C2Cl2
Molecular mass: 94.9
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 


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance may cause effects on the nervous system and kidneys. This may result in tissue lesions, impaired functions and kidney impairment. 

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

Effects of long-term or repeated exposure
 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 0.1 ppm as STEL; A3 (confirmed animal carcinogen with unknown relevance to humans).
MAK: carcinogen category: 2 

ENVIRONMENT
 

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
  EC Classification
Symbol: E, Xn; R: 2-40-48/20; S: (2)-36/37 

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    See Also:
       Toxicological Abbreviations
       Dichloroacetylene  (IARC Summary & Evaluation, Volume 39, 1986)
       Dichloroacetylene  (IARC Summary & Evaluation, Volume 71, 1999)