User:Pannaporn/sandbox2
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| Names | |||
|---|---|---|---|
| IUPAC name
1,1-Difluoroethene
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| Other names
Difluoro-1,1-ethylene; R-1132a; Halocarbon 1132 A; Freon 1132A; Vinylidene difluoride; Vinylidene fluoride[1]
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| Identifiers | |||
3D model (JSmol)
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| Abbreviations | VDF | ||
| ChemSpider | |||
| UNII | |||
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| Properties | |||
| C2H2F2 | |||
| Molar mass | 64.035 g·mol−1 | ||
| Appearance | Colorless gas[2] | ||
| Odor | Slightly ethereal[1] | ||
| Density | 2.89 kg/m3 (vapor, 0 °C)[2] 1.122 g/mL (liquid, -84 °C)[2] | ||
| Melting point | −144 °C (−227 °F; 129 K)[2] | ||
| Boiling point | −84 °C (−119 °F; 189 K)[2] | ||
| 0.254 g/L[3] | |||
| Vapor pressure | 35.2 atm (20°C)[4] | ||
| Hazards | |||
| Occupational safety and health (OHS/OSH): | |||
Main hazards
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Flammable[4] | ||
| 380 °C (716 °F; 653 K)[1] | |||
| Explosive limits | 5.5%-21.3%[4] | ||
| NIOSH (US health exposure limits): | |||
PEL (Permissible)
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none[4] | ||
REL (Recommended)
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TWA 1 ppm C 5 ppm[4] | ||
IDLH (Immediate danger)
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N.D.[4] | ||
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-Difluoroethylene also known as vinylidene fluoride, is a compound of the haloalkenes group. It is colorless gas that can be easily set on fire at typical temperature and pressure[5]. it is a hydrofluoroolefin. Global production in 1999 was approximately 33,000 metric tons.[3] It is primarily used in the production of fluoropolymers such as polyvinylidene fluoride.
Preparation
[edit]1,1-Difluoroethylene can be prepared using various methods. One of the methods is to get rid of Hydrogen chloride from 1-chloro-1,1-difluoroethane[6].
Another method is to remove Hydrogen fluoride from 1,1,1-trifluoroethane[7].
Hazard
[edit]1,1-Difluoroethylene can cause serious irritation. It can become vapor at normal temperature and pressure. Moreover, the change in pressure and temperature of the surrounding can leads to the rapid change in chemical.[8]
NMR spectrum
[edit]By looking at Proton nuclear magnetic resonance, it shows that there is one peak presents because of the two hydrogen atoms are chemically equivalent.
See also
[edit]References
[edit]- ^ a b c "Difluoro-1,1-ethylene". Gas Encyclopaedia. Air Liquide.
- ^ a b c d e Record in the GESTIS Substance Database of the Institute for Occupational Safety and Health
- ^ a b "1,1'-Difluoroethylene (VDF,VF2)" (PDF). International Programme on Chemical Safety.
- ^ a b c d e f NIOSH Pocket Guide to Chemical Hazards. "#0662". National Institute for Occupational Safety and Health (NIOSH).
- ^ "1,1'-DIFLUOROETHYLENE (VDF,VF2)" (PDF). Organisation for Economic Co-operation and Development. UNEP PUBLICATIONS. Retrieved 8 July 2017.
- ^ Kirk-Othmer Encyclopedia of Chemical Technology (4 ed.). John Wiley and Sons. 1994. pp. V11. Retrieved 8 July 2017.
- ^ Gerhartz, W (1985). Ullmann's Encyclopedia of Industrial Chemistry (5 ed.). VCH Publisher. pp. VA11. Retrieved 8 July 2017.
- ^ "1,1-DIFLUOROETHYLENE". CAMEO Chemicals. Office of Response and Restoration, National Ocean Service, National Oceanic and Atmospheric Administration, USA.gov. Retrieved 8 July 2017.
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