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TETRAFLUOROETHYLENE

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Name TETRAFLUOROETHYLENE EINECS 204-126-9
CAS No. 116-14-3 Density 1.306 g/cm3
Solubility Melting Point -142 °C
Formula C2F4 Boiling Point -76.301 °C at 760 mmHg
Molecular Weight 100.01 Flash Point -119.677 °C
Transport Information Appearance colourless gas
Safety 16-36/37/39-45 Risk Codes 11
Molecular Structure Molecular Structure of 116-14-3 (Ethene,1,1,2,2-tetrafluoro-) Hazard Symbols CorrosiveC,FlammableF
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;

 

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.

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