1,1-Difluoroethene

1,1-Difluoroethylene, also known as vinylidene fluoride, is a hydrofluoroolefin. This a flammable gas is a polyfluorinated version of ethene. Global production in 1999 was approximately 33,000 metric tons. It is primarily used in the production of fluoropolymers such as polyvinylidene fluoride and FKM.

1,1-Difluoroethene
Names
Preferred IUPAC name
1,1-Difluoroethene
Other names
Difluoro-1,1-ethylene; R-1132a; Halocarbon 1132 A; Freon 1132A; Vinylidene difluoride; Vinylidene fluoride
Identifiers
3D model (JSmol)
Abbreviations VDF
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.000.789
EC Number
  • 200-867-7
KEGG
PubChem CID
RTECS number
  • KW0560000
UNII
UN number 1959
  • InChI=1S/C2H2F2/c1-2(3)4/h1H2
    Key: BQCIDUSAKPWEOX-UHFFFAOYSA-N
  • InChI=1/C2H2F2/c1-2(3)4/h1H2
    Key: BQCIDUSAKPWEOX-UHFFFAOYAV
SMILES
  • C=C(F)F
Properties
C2H2F2
Molar mass 64.035 g·mol−1
Appearance Colorless gas
Odor Slightly ethereal
Density 2.89 kg/m3 (vapor, 0 °C)
1.122 g/mL (liquid, -84 °C)
Melting point −144 °C (−227 °F; 129 K)
Boiling point −84 °C (−119 °F; 189 K)
0.254 g/L
Vapor pressure 35.2 atm (20°C)
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Flammable
GHS labelling:
Warning
H315, H319, H335
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
380 °C (716 °F; 653 K)
Explosive limits 5.5%-21.3%
NIOSH (US health exposure limits):
PEL (Permissible)
 none
REL (Recommended)
 TWA 1 ppm C 5 ppm
IDLH (Immediate danger)
 N.D.
Related compounds
Related compounds
 1,2-Difluoroethene; fluoroethene; Trifluoroethylene; 2-Chloro-1,1-difluoroethylene;
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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