1,2-Dichloroethene
- Dichloroethene
- DCE
- 1,2- dichloroethylene
- Dioform
- Acetylendichlorid
- Sym -dichloroethylene
- R1130
- 540-59-0 ( mix of both forms )
- 156-59-2 (only cis form )
- 156-60-5 (only trans form )
Highly flammable, colorless liquid with ethereal odor
Liquid
- -50 ° C ( trans)
- -81 ° C ( cis)
- -57 ° C ( mixture )
- 48 ° C ( trans)
- 60 ° C ( cis)
- 361 hPa ( trans)
- 216 hPa ( cis)
- 220 hPa ( mixture )
Very poor in water
Risk
200 ml · m -3, 790 mg · m-3
770 mg · kg -1 ( LD50, rat, oral)
- -26.4 KJ / mol ( cis)
- -24.3 KJ / mol ( trans)
Template: Infobox chemical / molecular formula search available
1,2- dichloroethene is a chemical compound selected from the group of chlorinated alkenes, which occurs in the form of two cis-trans isomers.
Production and representation
1,2- dichloroethylene can be prepared by the chlorination of acetylene or by reduction of 1,1,2,2- tetrachloroethane.
It is also a byproduct of the production of other C2 chlorinated hydrocarbons such as trichlorethylene.
Occurrence
1,2- dichloroethene naturally arises under anaerobic conditions with appropriate environmental impact of tetrachloroethene and trichloroethene reductive dehalogenation due by the indigenous microbes, whereby 1,1- dichloroethene created in small quantities.
Properties
1,2- dichloroethene is a volatile, flammable liquid with a very strong odor and can therefore be perceived even in the smallest doses ( ≈ 15 ppm). The unstabilized product may polymerize.
Use
1,2- dichloroethene is used as a solvent for waxes, resins, fats, paints and polymers, and as a feedstock for the production of other solvents and chlorinated compounds.
Safety
1,2- dichloroethene is highly flammable and the vapors are narcotic and form an explosive mixture with air (flash point 2 ° C, ignition temperature 460 ° C).