1,2-Dibromoethylene

  • Acetylene dibromide
  • 2-Bromovinyl bromide
  • 1,2-Dibromoethene
  • sym-Dibromoethylene
Formula
BrCH=CHBr
Structure
Description
Clear, colorless liquid. A mixture of cis and trans isomers.
Uses
Research chemical (no evidence of commercial use in usa).

Registry Numbers and Inventories.
CAS
540-49-8
EC (EINECS/ELINCS)
208-747-6
RTECS
KV7700000
RTECS class
Mutagen
UN (DOT)
2810
Merck
12,92
Beilstein/Gmelin
1719351
Beilstein Reference
2-01-00-00164
Swiss Giftliste 1
G-7255
Canada DSL/NDSL
NDSL
US TSCA
Listed

Properties.
Formula
C2H2Br2
Formula mass
185.85
Melting point, °C
-53
Boiling point, °C
111 - 112
Vapor pressure, mmHg
31 (25 C)
Vapor density (air=1)
6.41
Density
2.268 g/cm3 (0 C)
Solubility in water
Insoluble
Refractive index
1.55562 (0 C)
Partition coefficient, pKow
2.08
Heat of vaporization
33.3 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Use only in a chemical fume hood. Discard contaminated shoes. Do not breathe vapors.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective gloves and clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong bases, magnesium.
Decomposition
Carbon monoxide, carbon dioxide, hydrogen bromide, bromide fumes.

Fire.
Flash Point,°C
-4
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Combustible material: may burn but does not ignite readily.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
3
Exposure effects
Narcotic in high concentrations.
   Ingestion
Harmful if swallowed. May cause severe gastrointestinal tract irritation with nausea, vomiting and possible burns. Ingestion of large amounts may cause CNS depression.
   Inhalation
Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema. May cause burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting.
   Skin
Causes severe skin irritation and possible burns.
   Eyes
Lachrymator. Causes severe eye irritation and possible burns.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. Induce vomiting only when instructed to do so by a physician.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. Do not use mouth-to-mouth respiration if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed.

Transport.
UN number
2810
Response guide
Hazard class
6.1
Packing Group
I; II; III