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Basic Information
| CAS No.: | 116-14-3 |
|---|---|
| Name: | Tetrafluoroethylene |
| Molecular Structure: | |
|
|
|
| Formula: | C2F4 |
| Molecular Weight: | 100.016 |
| Synonyms: | Ethene,tetrafluoro- (9CI);Ethylene, tetrafluoro- (6CI,8CI);1,1,2,2-Tetrafluoroethylene;Ethylene tetrafluoride;Lubron 5;PFC 1114;Perfluoroethene;Perfluoroethylene;R 1114;TFE;Teflon 851K02730;Tetrafluoroethene;Tetrafluoroethylene; |
| EINECS: | 204-126-9 |
| Density: | 1.306 g/cm3 |
| Melting Point: | -142 °C |
| Boiling Point: | -76.301 °C at 760 mmHg |
| Flash Point: | -119.677 °C |
| Solubility: | 110mg/L at 28℃ |
| Appearance: | colourless gas |
| Hazard Symbols: |
 C, F
|
| Risk Codes: | 11 |
| Safety: | 16-36/37/39-45 |
| PSA: | 0.00000 |
| LogP: | 1.99100 |
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Synthetic route
- 187737-37-7
propene
- 931-91-9
1,1,2,2,3,3-Hexafluoro-cyclopropane
A
- 116-14-3
polytetrafluoroethylene
B
- 373-94-4
1,1-difluoro-2-methylcyclopropane
C
- 115-25-3
Octafluorocyclobutane
D
- 374-30-1
1,1,2,2-tetrafluoro-3-methylcyclobutane
Conditions
| Conditions | Yield |
|---|---|
| at 296℃; for 1h; sealed tube in vacuo; | A 16% B 100% C 9% D 21% |
| at 296℃; sealed tube in vacuo; | A 16% B 100% C 9% D 21% |
...Expand
- 379-14-6
1,2,2,3,3-pentafluoro-1-difluoromethylcyclopropane
A
- 116-14-3
polytetrafluoroethylene
B
- 433-66-9
pentafloropropylene
C
- 931-91-9
1,1,2,2,3,3-Hexafluoro-cyclopropane
D
- 115-25-3
Octafluorocyclobutane
Conditions
| Conditions | Yield |
|---|---|
| at 300℃; for 160h; Further byproducts given; | A 28% B 100% C 6% D 12% |
...Expand
Conditions
| Conditions | Yield |
|---|---|
| With hydrogen at 336.84 - 736.84℃; Product distribution / selectivity; Gas phase; Inert atmosphere; | 100% |
- 379-14-6
1,2,2,3,3-pentafluoro-1-difluoromethylcyclopropane
- 110-83-8
cyclohexene
A
- 116-14-3
polytetrafluoroethylene
B
- 433-66-9
pentafloropropylene
C
- 115-25-3
Octafluorocyclobutane
D
- 823-70-1
7,7-difluoronorcarane
Conditions
| Conditions | Yield |
|---|---|
| at 200℃; for 320h; Further byproducts given; | A 14% B 99% C n/a D 47% |
...Expand
- 379-14-6
1,2,2,3,3-pentafluoro-1-difluoromethylcyclopropane
- 110-83-8
cyclohexene
A
- 116-14-3
polytetrafluoroethylene
B
- 433-66-9
pentafloropropylene
C
- 201230-82-2
carbon monoxide
D
- 115-25-3
Octafluorocyclobutane
E
- 823-70-1
7,7-difluoronorcarane
F
- 7783-61-1
silicon tetrafluoride
Conditions
| Conditions | Yield |
|---|---|
| With Pyrex tube at 200℃; for 320h; Product distribution; Mechanism; further periods of contact time, other temperatures; | A 14% B 99% C 11% D n/a E 47% F 13% |
...Expand
Conditions
| Conditions | Yield |
|---|---|
| at 300℃; Pyrolysis; | 98% |
Conditions
| Conditions | Yield |
|---|---|
| With sodium dithionite; Allyl ether; sodium hydrogencarbonate In water; acetonitrile at 20℃; for 0.0833333h; | 97% |
- 116-14-3
polytetrafluoroethylene
Conditions
| Conditions | Yield |
|---|---|
| at 630 - 650℃; under 0.6 - 2 Torr; for 0.5h; | 96% |
Conditions
| Conditions | Yield |
|---|---|
| With high nickel alloy at 420 - 955℃; for 6.94444E-05h; Temperature; | 95.2% |
| In gas Product distribution; Irradiation; dependence on pressure and light intensity; | |
| Pyrolysis; |
Conditions
| Conditions | Yield |
|---|---|
| at 300℃; Pyrolysis; | 91.3% |
Raw Materials
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Tetrafluoroethylene
Chemistry
Molecular Formula: C2F4 
Formula Weight: 100.02
mp of TETRAFLUOROETHYLENE (116-14-3): -142°C
bp of TETRAFLUOROETHYLENE (116-14-3): -76.3°C
Density: 1.519 g/cm3
Vapour Pressure: 20000 mmHg at 25°C
Index of Refraction: 1.241
VAPOR DENSITY (air=1): 3.9
SOLUBILITY: TETRAFLUOROETHYLENE (116-14-3) do not dissolve in water.
Appearance: TETRAFLUOROETHYLENE (116-14-3) is an odorless and colorless gas.
Formula Weight: 100.02
mp of TETRAFLUOROETHYLENE (116-14-3): -142°C
bp of TETRAFLUOROETHYLENE (116-14-3): -76.3°C
Density: 1.519 g/cm3
Vapour Pressure: 20000 mmHg at 25°C
Index of Refraction: 1.241
VAPOR DENSITY (air=1): 3.9
SOLUBILITY: TETRAFLUOROETHYLENE (116-14-3) do not dissolve in water.
Appearance: TETRAFLUOROETHYLENE (116-14-3) is an odorless and colorless gas.
Uses
TETRAFLUOROETHYLENE (116-14-3) is used as a monomer for manufacturing polyfluortetraethylene, other fluoroplastic, fluorubber and perfluoro propylene. TETRAFLUOROETHYLENE (116-14-3) is also used in the preparation of numerous copolymers that also include hydrogen and/or oxygen, including both fluoroplastics and fluoroelastomers.
Production
TETRAFLUOROETHYLENE (116-14-3) is manufactured from chloroform.
CHCl3 + 2HF → CHClF2 + 2HCl
2CHClF2 → C2F4 + 2HCl
CHCl3 + 2HF → CHClF2 + 2HCl
2CHClF2 → C2F4 + 2HCl
Toxicity Data With Reference
| 1. | ihl-rat LC50:40,000 ppm/4H | JOCMA7 Journal of Occupational Medicine. 4 (1962),262. | ||
| 2. | ihl-mus LC50:143 g/m3/kg | GTPZAB Gigiena Truda i Professionalnye Zabolevaniia. Labor Hygiene and Occupational Diseases. 21 (5)(1977),36. | ||
| 3. | ihl-gpg LC50:116 g/m3/kg | GTPZAB Gigiena Truda i Professionalnye Zabolevaniia. Labor Hygiene and Occupational Diseases. 21 (5)(1977),36. |
Consensus Reports
NTP 10th Report on Carcinogens. IARC Cancer Review: Group 3 IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 ,1987,p. 56.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . Reported in EPA TSCA Inventory.
Safety Profile
Safety: WARNING: Irreversible damage risk, protect skin/eyes/lungs; Safety glasses, adequate ventilation.
Hazard Codes : C: Corrosive
F: Highly Flammable
Risk Statements : 11: Highly Flammable
Safety Statements : 16: Keep away from sources of ignition - No smoking
36/37/39: Wear suitable protective clothing, gloves and eye/face protection
45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
RIDADR : 1081
Hazard Note : Corrosive/Flammable
HazardClass : 2.1
Confirmed carcinogen. Mildly toxic by inhalation. Can act as an asphyxiant and may have other toxic properties. The gas is flammable when exposed to heat or flame. The inhibited monomer will explode if ignited. Explosive in the form of vapor when exposed to heat or flame. Will explode at pressures above 2.7 bar if limonene inhibitor is not added. Iodine pentafluoride depletes the limonene inhibitor and then causes explosive polymerization of the monomer. Mixtures with hexafluoropropene and air form an explosive peroxide. Reacts violently with SO3; air; difluoromethylene dihypofluorite; dioxygen difluoride; iodine pentafluoride; oxygen. When heated to decomposition it emits highly toxic fumes of F−. See also FLUORIDES.
Hazard Codes : C: Corrosive
F: Highly Flammable
Risk Statements : 11: Highly Flammable
Safety Statements : 16: Keep away from sources of ignition - No smoking
36/37/39: Wear suitable protective clothing, gloves and eye/face protection
45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
RIDADR : 1081
Hazard Note : Corrosive/Flammable
HazardClass : 2.1
Confirmed carcinogen. Mildly toxic by inhalation. Can act as an asphyxiant and may have other toxic properties. The gas is flammable when exposed to heat or flame. The inhibited monomer will explode if ignited. Explosive in the form of vapor when exposed to heat or flame. Will explode at pressures above 2.7 bar if limonene inhibitor is not added. Iodine pentafluoride depletes the limonene inhibitor and then causes explosive polymerization of the monomer. Mixtures with hexafluoropropene and air form an explosive peroxide. Reacts violently with SO3; air; difluoromethylene dihypofluorite; dioxygen difluoride; iodine pentafluoride; oxygen. When heated to decomposition it emits highly toxic fumes of F−. See also FLUORIDES.
Standards and Recommendations
ACGIH TLV: TWA 2 ppm; Confirmed Animal Carcinogen with Unknown Relevance to Humans
DOT Classification: 2.1; Label: Flammable Gas
DOT Classification: 2.1; Label: Flammable Gas
Specification
STORAGE: Store and handle in accordance with all current regulations and standards. Store outside or in a detached building. Store in a well-ventilated area. Avoid contact with light. Keep separated from incompatible substances. Protect from physical damage. Provide fire protection and spill control systems suitable for the hazards of the material.