| Molecular Formula | C2F4 |
| Molar Mass | 100.01 |
| Density | 1.1507 |
| Melting Point | -142°C |
| Boling Point | -76.3°C |
| Refractive Index | 1.2420 (estimate) |
| Physical and Chemical Properties | Chemical properties colorless gas. Than air. Insoluble in water. |
| Use | Use 1. For the manufacture of fluororesin, fluoroelastomer and other fluorine-containing intermediates. 2, tetrafluoroethylene, also known as perfluoroethylene, is mainly used in plastics, resin industry, in pesticides is also the intermediate of the fluorine. 3, the manufacture of polytetrafluoroethylene and other fluorine plastic, fluorine rubber and fluorine propylene monomer. It can be used as a raw material for the manufacture of new types of thermoplastics, engineering plastics, oil-resistant and low-temperature-resistant rubbers, new fire extinguishing agents and anti-fog agents. |
| Risk Codes | 11 - Highly Flammable |
| Safety Description | S16 - Keep away from sources of ignition. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | 1081 |
| stability | Stable. Reactive when heated. |
| NIST chemical information | Ethene, tetrafluoro-(116-14-3) |
| (IARC) Carcinogen Classification | 2A (Vol. 19, Sup 7, 71, 110) 2017 |
| EPA chemical information | Tetrafluoroethene (116-14-3) |
application
tetrafluoroethylene is an important raw material for the manufacture of polytetrafluoroethylene plastics. This plastic is resistant to high temperature and corrosion; fluororubber and fluororesin monomers; raw materials for fire extinguishing agents and fog suppressors; raw materials for other fluorides.
production method
1. difluorochloromethane is gasified, preheated and passed into the cracking furnace, and the cracking gas containing tetrafluoroethylene monomer is produced by thermal cracking. the finished product is finally rectified by water washing, alkali washing, compression, freezing dehydration, drying, fractionation and other processes.
2. The preparation of tetrafluoroethylene is obtained by thermal cracking of difluorochloromethane. Reaction equation: 2 CHClF2 & rarr;CF2 = CF2 2HCl
platinum-lined tube is used as the cracking reaction tube, superheated water vapor is used as the diluent, and the cracking is carried out at 600~900 ℃ to obtain tetrafluoroethylene. After cooling and separation, the hydrogen chloride is removed by water washing and alkali washing, and then pressurized rectification at -20 ℃ and 2.02 MPa, a polymer grade pure product with a content of more than 99.9% can be obtained.
category
Harmful gases
toxicity classification
low toxicity
acute toxicity
Inhalation-rat LC50:40000PPM/4 hours; Inhalation-mouse LC50:143000 mg/m3/4 hours
explosive hazard characteristics
Explosive mixing with air
flammability hazard characteristics
Flammable; decomposes toxic hydrogen fluoride gas when heated; prevents scalding
storage and transportation features
The warehouse is ventilated and dry at low temperature; stored separately from the oxidant
fire extinguishing agent
mist water, foam, carbon dioxide
| Hazard Note | Corrosive/Flammable |
| HazardClass | 2.1 |
| toxic substance data | 116-14-3(Hazardous Substances Data) |
| Toxicity | LC50 (4 hr) in rats, mice, hamsters, guinea pigs (ppm): 37500-45000, 35000, 28500, 28000 (Kennedy) |