1,2-Dichloropropane
- Propylene dichloride
- 1,2- DCP
- 1,2- D
- (RS ) -1,2- dichloropropane
- ( ±) -1,2- dichloropropane
- (R ) -1,2- dichloropropane
- (S ) -1,2- dichloropropane
Colorless liquid with a sweet odor
Liquid
1.16 g · cm -3
-100.44 ° C
96 ° C
51 hPa ( 20 ° C)
3 g · l-1 at 20 ° C in water
1.4394 (± 20 ° C)
Risk
Repealed as carcinogenic
-198.8 KJ / mol
Template: Infobox chemical / molecular formula search available
1,2- dichloropropane is a chemical compound, a clear, colorless to yellow, flammable liquid with a sweet, chloroform - like odor. It was used as a solvent in many commodity chemicals and is a starting material for organic synthesis. When it passes into the body or on the skin, it can cause kidney and liver damage. Since it is degraded only by specific bacteria, it accumulates in the soil and presents a problem in groundwater dar.
Extraction
The first 1869 Carl Schorlemmer reported the preparation of 1,2- dichloropropane, as it in a glass container exposing a mixture of the chlorine and propane gases to sunlight. Even today it is a major product in the technical chlorination of propane. The synthesis takes place via the monochlorinated Propane, which in turn are further reacted immediately to the dichlorinated.
Use and ecology
DCP was used widely as a solvent for oils, waxes, resins, adhesives, degreasers, pesticides and varnish, but has been replaced by other substances. It is still a starting material for organic synthesis.
Although 1,2- dichloropropane is no longer allowed due to low efficacy for container fumigation in Germany since 1987, you can still find the material due to its high stability today in soil and in groundwater, partly it comes to exceedances. As a result, had several wells and all water plants will be decommissioned or activated carbon filter plants will be built in the district of Pinneberg. The half-life of DCP in groundwater is between 6 months and 2 years.
Anaerobic bacteria belonging to the genus Dehalococcoides are able to reduce propylene dichloride.
Stereoisomerism
1,2- dichloropropane is chiral, ie has a stereocenter. Thus, there exist two enantiomers: (R) -1,2- dichloropropane, and ( S) -1,2 -dichloropropane. If by " 1,2- dichloropropane " is spoken without a prefix, the racemate [ 1:1 mixture of (R ) -1,2- dichloropropane and (S ) -1,2- dichloropropane ] meant so (RS ) -1,2- dichloropropane.