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116-14-3

Basic Information
CAS No.: 116-14-3
Name: Tetrafluoroethylene
Article Data: 301
Molecular Structure:
Molecular Structure of 116-14-3 (Tetrafluoroethylene)
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: CorrosiveC,FlammableF
Risk Codes: 11
Safety: 16-36/37/39-45
PSA: 0.00000
LogP: 1.99100
Synthetic route
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
ConditionsYield
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%
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
ConditionsYield
at 300℃; for 160h; Further byproducts given;A 28%
B 100%
C 6%
D 12%
76-16-4

Hexafluoroethane

116-14-3

polytetrafluoroethylene

Conditions
ConditionsYield
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
ConditionsYield
at 200℃; for 320h; Further byproducts given;A 14%
B 99%
C n/a
D 47%
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
ConditionsYield
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%
378-76-7

Potassium pentafluoropropionate

116-14-3

polytetrafluoroethylene

Conditions
ConditionsYield
at 300℃; Pyrolysis;98%
1184-76-5

difluorodiiodomethane

116-14-3

polytetrafluoroethylene

Conditions
ConditionsYield
With sodium dithionite; Allyl ether; sodium hydrogencarbonate In water; acetonitrile at 20℃; for 0.0833333h;97%
polytetrafluoroethylene (1)

polytetrafluoroethylene (1)

116-14-3

polytetrafluoroethylene

Conditions
ConditionsYield
at 630 - 650℃; under 0.6 - 2 Torr; for 0.5h;96%
75-45-6

Chlorodifluoromethane

116-14-3

polytetrafluoroethylene

Conditions
ConditionsYield
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;
378-77-8

sodium pentafluoropropionate

116-14-3

polytetrafluoroethylene

Conditions
ConditionsYield
at 300℃; Pyrolysis;91.3%
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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/cm
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

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.

Standards and Recommendations

ACGIH TLV: TWA 2 ppm; Confirmed Animal Carcinogen with Unknown Relevance to Humans
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.