1,1-Dichloroethene

Chembox new
Name = 1,1-Dichloroethene
ImageFile = 1,2-Dichloroethene.svg
ImageSize = 150px
ImageName = 1,1-Dichloroethene
IUPACName = 1,1-Dichloroethene
OtherNames = 1,1-Dichloroethylene
1,1-DCE
vinylidene chloride
vinylidene dichloride
Section1 = Chembox Identifiers
CASNo = 75-35-4
SMILES = ClC(Cl)=C
Section2 = Chembox Properties
Formula = C₂H₂Cl₂
MolarMass = 96.95 g/mol
Density = 1.213 g/cm³
MeltingPt = -122 °C
BoilingPt = 32 °C
Dipole = 2.3 D
Section7 = Chembox Hazards
NFPA-H = 2
NFPA-F = 4
NFPA-R = 2

1,1-Dichloroethene, commonly called 1,1-dichloroethylene or 1,1-DCE, is an organochloride with the molecular formula C₂H₂Cl₂. It is a highly flammable, colorless liquid with a sharp, harsh odor. It is insoluble in water, but soluble in ethanol, diethyl ether, acetone, benzene, and chloroform.

1,1-DCE is used as a comonomer in the polymerization of vinyl chloride, acrylonitrile, and acrylates.

1,1-DCE is used in semiconductor device fabrication for growing high purity silicon dioxide (SiO₂) films.

The health effects from exposure to 1,1-DCE are primarily on the central nervous system, including symptoms of sedation, inebriation, convulsions, spasms, and unconsciousness at high concentrations. [ [http://www.epa.gov/ttn/atw/hlthef/di-ethyl.html epa.gov] ]

As with other unsaturated carbon compounds, 1,1-DCE can be polymerised to form polyvinylidene chloride. A very widely used product, cling wrap, or Saran was made from this polymer. During the 1990s research suggested that, in common with many chlorinated carbon compounds, Saran posed a possible danger to health by leaching, especially on exposure to food in microwave ovens. Since 2004, therefore cling wrap's formulation has changed to a form of polythene.

See also

* 1,2-Dichloroethene
* 1,1-Dichloroethane

References