- 2-Butene, 1,4-dichloro
- 2-Butylene dichloride
A clear colorless liquid.
Chemical intermediate for 3,4-dichloro-1-butene, adiponitrile (a hexamethylenediamine int) & chemical intermediate for 1,4-butanediol (non-us use).
Registry Numbers and Inventories.
EC Index Number
Carcinogenic Category 2; Very toxic; Toxic; Corrosive; Dangerous for the Environment
Tumorigen; Mutagen; Reproductive Effector
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
3.9 (25 C)
Vapor density (air=1)
Solubility in water
1.4880 (20 C)
Partition coefficient, pKow
Heat of vaporization
Heat of combustion
Hazards and Protection.
Open venting with flame arrester.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate clothing to prevent any reasonable probability of skin contact. Wear eye protection to prevent any possibility of eye contact.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Use water spray to knock-down vapors.
Container may explode in heat of fire. Runoff to sewer may create fire or explosion hazard.
Can react with some metals to form dangerous products Incompatible with strong oxidizing and reducing agents Incompatible with many amines, nitrides, azo/diazo compounds, alkali metals, and epoxides.
When heated to decomposition it emits toxic fumes of hydrogen chloride.
Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Solid streams of water may be ineffective. Use foam, dry chemical, or carbon dioxide. Use water spray to knock-down vapors.
If fire becomes uncontrollable or container is exposed to direct flame- evacuate for a radius of 1500 ft. If material leaking (not on fire), downwind evacuation must be considered.
Decomposition vapors contain phosgene and hydrogen chloride gases; both are toxic and irritating.
OSHA: A2. A2= Suspected human carcinogen.
DCB was not teratogenic in rats.
Severe irritation or burns of the esophagus or stomach may be seen.
Liquid and vapor are highly irritating or corrosive to the lungs.
Burns with severe blistering may be seen.
Induce vomiting; call physician.
Remove from exposure; provide low-pressure oxygen if required; keep under observation until edema is ruled out.
Wash immediately and thoroughly with soap and water; treat as a chemical burn.
Irrigate immediately for 15 min.; call physician.