1,1-Dichloroethylene

1,1-Dichloroethylene
Structural formula
Structural formula
Ball-and-stick model
Ball-and-stick model
Names
Preferred IUPAC name
1,1-Dichloroethene
Other names
1,1-Dichloroethylene
1,1-DCE
Vinylidene chloride
Vinylidene dichloride
Asymmetrical dichloroethene
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.000.786 Edit this at Wikidata
KEGG
UNII
  • InChI=1S/C2H2Cl2/c1-2(3)4/h1H2 ☒N
    Key: LGXVIGDEPROXKC-UHFFFAOYSA-N ☒N
  • ClC(Cl)=C
Properties
C2H2Cl2
Molar mass 96.94 g/mol
Density 1.213 g/cm3
Melting point −122 °C (−188 °F; 151 K)
Boiling point 32 °C (90 °F; 305 K)
2,240mg/L (25°C)
Vapor pressure 500 mmHg (20°C)[1]
-49.2·10−6 cm3/mol
1.3 D
Structure
C2v
Planar
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 4: Will rapidly or completely vaporize at normal atmospheric pressure and temperature, or is readily dispersed in air and will burn readily. Flash point below 23 °C (73 °F). E.g. propaneInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazards (white): no code
2
4
2
Flash point −22.8 °C (−9.0 °F; 250.3 K)
Explosive limits 6.5–15.5%[1]
Lethal dose or concentration (LD, LC):
1500 mg/kg (rat)
194 mg/kg (mouse)[2]
200 ppm (rat, 4.1 hr)
98 ppm (mouse, 22–23 hr)
1,000 ppm (rat, 2.4 hr)[2]
NIOSH (US health exposure limits):
PEL (Permissible)
 none[1]
REL (Recommended)
 Ca[1]
IDLH (Immediate danger)
 Ca [N.D.][1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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1,1-Dichloroethylene, commonly called vinylidene chloride or 1,1-DCE, is an organochloride with the molecular formula CHCl2CH3. It is a colorless liquid with a sharp odor. Like most chlorocarbons, it is poorly soluble in water but soluble in organic solvents. 1,1-DCE was the precursor to the original clingwrap, Saran, for food, but this application has been phased out.

  1. ^ a b c d e NIOSH Pocket Guide to Chemical Hazards. "#0661". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ a b "Toxicological Review of 1,1-Dichloroethylene" (PDF). United States Environmental Protection Agency. Washington, D.C. June 2002.