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Tetrafluoroethylene

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Tetrafluoroethylene Basic information
Tetrafluoroethylene Chemical Properties
Safety Information
  • Hazard Codes C,F
  • Risk Statements 11
  • Safety Statements 16-36/37/39-45
  • RIDADR 1081
  • Hazard Note Corrosive/Flammable
  • HazardClass 2.1
  • Hazardous Substances Data116-14-3(Hazardous Substances Data)
  • ToxicityLC50 (4 hr) in rats, mice, hamsters, guinea pigs (ppm): 37500-45000, 35000, 28500, 28000 (Kennedy)
MSDS
Tetrafluoroethylene Usage And Synthesis
  • Chemical Propertiescolourless gas
  • Chemical PropertiesTFE is a colorless, flammable gas.
  • UsesIn manufacture of polymers and synthesis of fluorinated refrigerants, dielectric media and solvents. In vinyl polymerization, cycloalkylation and addition reactions.
  • DefinitionA gaseous organic compound (a fluorocarbon and a haloalkene) used to make the plastic polytetrafluoroethene (PTFE).
  • General DescriptionA colorless odorless gas. Easily ignited. Vapors are heavier than air. May asphyxiate by the displacement of air. May violently polymerize under prolonged exposure to fire or heat, violently rupturing the container. Under prolonged exposure to fire or heat the containers may rupture violently and rocket. Water insoluble.
  • Air & Water ReactionsFlammable. Forms polymeric peroxides that are explosive [Bretherick 1979 p. 164].
  • Reactivity ProfileTETRAFLUOROETHYLENE reacts with air (oxygen) to form polymeric peroxides that are explosive [Bretherick 1979 p. 164]. Probably susceptible to similar reactions with a number of oxidizing agents.May polymerize violently (inhibitor tends to prevent this reaction). May react violently with aluminum. Contamination of a tetrafluoroethylene gas supply system led to a reaction between the inhibitor, limonene, and the contaminant, iodine pentafluoride. This initiated an explosive polymerization event [MCA Case History No. 1520].
  • HazardFlammable, dangerous fire risk. Kidney and liver damage; kidney and liver cancer. Possible carcinogen.
  • Health HazardInhalation causes irritation of respiratory system. Contact with eyes causes slight irritation.
  • Safety ProfileConfirmed 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 igntted. Explosive in the form of vapor when exposed to heat or flame. Will explode at pressures above 2.7 bar if limonene inhbitor is not added. Iodine pentafluoride depletes the limonene inhbitor and then causes explosive polymerization of the monomer. Mixtures with hexafluoropropene and air form an explosive peroxide. Reacts violently with SO3; air; dfluoromethylene dihypofluorite; loxygen difluoride; iodine pentafluoride; oxygen. When heated to decomposition it emits highly toxic fumes of F-. See also FLUORIDES.
  • Potential ExposureA potential danger to those involved in the production of TFE and the manufacture of fluorocarbon polymers.
  • CarcinogenicityTetrafluoroethylene is reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in experimental animals (NTP 1997).
  • ShippingUN1081 Tetrafluoroethylene, stabilized, Hazard Class: 2.1; Labels: 2.1-Flammable gas. Cylinders must be transported in a secure upright position, in a well-ventilated truck. Protect cylinder and labels from physical damage. The owner of the compressed gas cylinder is the only entity allowed by federal law (49CFR) to transport and refill them. It is a violation of transportation regulations to refill compressed gas cylinders without the express written permission of the owner.
  • IncompatibilitiesReacts with air. Hazardous polymerization may occur unless inhibited. Will explode at pressures above 2.7 bar if terpene inhibitor is not added. Inhibited monomer can decompose explosively in fire, under pressure, or upon contact with materials with which it can react exothermically. Violent reaction with oxygen, oxidizers, sulfur trioxide; halogen compounds.
  • Waste DisposalReturn refillable compressed gas cylinders to supplier. Nonrefillable cylinders should be disposed of in accordance with local, state and federal regulations. Allow remaining gas to vent slowly into atmosphere in an unconfined area or exhaust hood. Refillable-type cylinders should be returned to original supplier with any valve caps and outlet plugs secured and valve protection caps in place.
Tetrafluoroethylene Preparation Products And Raw materials
Tetrafluoroethylene(116-14-3)Related Product Information
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