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| CAS No.: | 75-38-7 |
|---|---|
| Name: | 1,1-Difluoroethene |
| Molecular Structure: | |
|
|
|
| Formula: | C2H2F2 |
| Molecular Weight: | 64.0347 |
| Synonyms: | Ethylene,1,1-difluoro- (8CI);1,1-Difluoroethene;1,1-Difluoroethylene;FC 1132a;Fluorovinylidene;Genetron 1132a;HFC 1132a;R 1132a;Vinylidene difluoride;Vinylidene fluoride; |
| EINECS: | 200-867-7 |
| Density: | 0.95 g/cm3 |
| Melting Point: | -144 °C(lit.) |
| Boiling Point: | -83 °C |
| Flash Point: | <-60oC |
| Solubility: | slightly soluble in water and soluble in alcohol and ether |
| Appearance: | colorless gas |
| Hazard Symbols: |
 F+, F
|
| Risk Codes: | 12 |
| Safety: | 16-7/9 |
| Transport Information: | UN 1959 |
| PSA: | 0.00000 |
| LogP: | 1.39660 |
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- 56354-44-0
β,β,β-trifluoroethyl phenyl sulfone
- 75-38-7
Vinylidene fluoride
| Conditions | Yield |
|---|---|
| With chloro-trimethyl-silane; magnesium In N,N-dimethyl-formamide at 20℃; for 0.25h; | 100% |
- 49852-57-5
1,1,2-trifluoro-2-(trifluoromethyl)cyclobutane
A
- 75-38-7
Vinylidene fluoride
B
- 754-12-1
2,3,3,3-tetrafluoro-propene
| Conditions | Yield |
|---|---|
| at 800℃; for 7.83h; Inert atmosphere; | A 97% B 81% |
- 359-10-4
1-Chloro-2,2-difluoroethene
A
- 116-14-3
polytetrafluoroethylene
B
- 75-38-7
Vinylidene fluoride
C
- 359-11-5
1,1,2-trifluoroethylene
| Conditions | Yield |
|---|---|
| With hydrogen sulfide Product distribution; Irradiation; added CH3OH or alone; | A 6% B 82% C 12% |
| Conditions | Yield |
|---|---|
| With potassium phosphate; [(2,2''-bipyridine)Ni(CH2CF3)2] In 1,2-dimethoxyethane at 80℃; Suzuki Coupling; | A n/a B 57% C n/a |
- 74-87-3
methylene chloride
- 115-25-3
Octafluorocyclobutane
A
- 116-14-3
polytetrafluoroethylene
B
- 75-38-7
Vinylidene fluoride
| Conditions | Yield |
|---|---|
| at 250 - 800℃; under 150.015 Torr; | A 56.2% B n/a |
| Conditions | Yield |
|---|---|
| In diethyl ether -30°C; | 56% |
- 338-65-8
1-chloro-2,2-difluoroethane
A
- 75-38-7
Vinylidene fluoride
B
- 1691-13-0
1,2-difluoroethene
C
- 460-16-2
1-chloro-2-fluoroethylene
| Conditions | Yield |
|---|---|
| at 650℃; Activation energy; Product distribution; Further Variations:; Temperatures; | A 32% B 53% C 13% |
| at 650℃; | A 32% B 53% C 13% |
- 74-83-9
methyl bromide
- 75-45-6
Chlorodifluoromethane
A
- 116-14-3
polytetrafluoroethylene
B
- 74-87-3
methylene chloride
C
- 34557-54-5
methane
D
- 75-38-7
Vinylidene fluoride
| Conditions | Yield |
|---|---|
| at 499.84 - 849.84℃; under 757.576 Torr; Further byproducts.; | A n/a B n/a C n/a D 53% |
- 13821-49-3
perfluoro(N,N-dimethyl trifluorovinylamine)
A
- 75-46-7
trifluoromethan
B
- 75-38-7
Vinylidene fluoride
C
- 76-16-4
Hexafluoroethane
D
- 460-49-1
trifluoromethyl isocyanate
E
- 559-93-3
perfluoro(2-aza-1-hexene)
| Conditions | Yield |
|---|---|
| With toluene pyrolysis 610°C, contact time 0.66 sec, further product; | A n/a B n/a C n/a D n/a E 46% |
| With toluene pyrolysis 610°C, contact time 0.66 sec, further product; | A n/a B n/a C n/a D n/a E 46% |
- 34557-54-5
methane
- 115-25-3
Octafluorocyclobutane
A
- 116-14-3
polytetrafluoroethylene
B
- 116-15-4
perfluoropropylene
C
- 75-38-7
Vinylidene fluoride
D
- 754-12-1
2,3,3,3-tetrafluoro-propene
E
- 359-11-5
1,1,2-trifluoroethylene
| Conditions | Yield |
|---|---|
| at 250 - 800℃; under 150.015 Torr; for 0.000175h; Temperature; | A 45.8% B 7.4% C 10.4% D 8.4% E 9.5% |
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Consensus Reports
Standards and Recommendations
DFG MAK: Confirmed Animal Carcinogen with Unknown Relevance to Humans
DOT Classification: 2.1; Label: Flammable Gas
NIOSH REL: (Vinyl Halides) TWA reduce to lowest detectable level
Specification
The Vinylidene fluoride, with the CAS registry number 75-38-7 and EINECS registry number 200-867-7, has the systematic name of 1,1-difluoroethene. It is a colorless gas, and bleongs to the following product categories: CFC; Refrigerants; Organics. It is slightly soluble in water and soluble in alcohol and ether. And the molecular formula of this chemical is C2H2F2.
The physical properties of Vinylidene fluoride are as following: (1)ACD/LogP: 1.25; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.25; (4)ACD/LogD (pH 7.4): 1.25; (5)ACD/BCF (pH 5.5): 5.24; (6)ACD/BCF (pH 7.4): 5.24; (7)ACD/KOC (pH 5.5): 113.84; (8)ACD/KOC (pH 7.4): 113.84; (9)#H bond acceptors: 0; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: Å2; (13)Index of Refraction: 1.264; (14)Molar Refractivity: 11.21 cm3; (15)Molar Volume: 67.3 cm3; (16)Polarizability: 4.44×10-24cm3; (17)Surface Tension: 8.7 dyne/cm; (18)Density: 0.95 g/cm3.
Preparation and uses of Vinylidene fluoride: Dry acetylene reacts with hydrofluoric acid in the presence of fluosulfonic acid, and gives 1,1-difluoroethane. Then mix with a certain amount of chlorine in the temperaure of 650-680 °C. Through a series of pyrogenation, you can get the vinylidene fluoride. In addition, it is usually used to produce polyvinylidene fluoride(PVDF), a kind of irradiation resistance material. It is also used as raw material of fluor resin and fluorubber.
You should be cautious while dealing with this chemical. It is a kind of extremely flammable chemical. Therefore, you had better take the following instructions: Keep away from sources of ignition - No smoking; Keep container tightly closed and in a well-ventilated place.
You can still convert the following datas into molecular structure:
(1)SMILES: C=C(F)F
(2)InChI: InChI=1/C2H2F2/c1-2(3)4/h1H2
(3)InChIKey: BQCIDUSAKPWEOX-UHFFFAOYAV
The toxicity data is as follows:
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| guinea pig | LCLo | inhalation | 800ppb/4H (0.8ppm) | National Technical Information Service. Vol. OTS0523847, | |
| rat | LCLo | inhalation | 128000ppm/4H (128000ppm) | LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES | Journal of Occupational Medicine. Vol. 4, Pg. 262, 1962. |