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Tetrafluoroethylene

Tetrafluoroethylene structure

CAS No:
116-14-3
Formula:
C2F4
Chemical Name:
Tetrafluoroethylene
Synonyms:
Ethene,1,1,2,2-tetrafluoro-;Ethylene,tetrafluoro-;Ethene,tetrafluoro-;1,1,2,2-Tetrafluoroethene;Tetrafluoroethylene;Tetrafluoroethene;Perfluoroethene;Perfluoroethylene;TFE;1,1,2,2-Tetrafluoroethylene;Ethylene tetrafluoride;R 1114;Teflon 851K02730;PFC 1114;BYK 990;FO 1114;9014-83-9;1449755-53-6
Categories:
Organic Chemistry > Hydrocarbons and Derivatives

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Description

Colorless, odorless gas.

Tetrafluoroethylene Basic Attributes

Molecular Weight：

100.02

Exact Mass：

100.01

EC Number：

204-126-9

HScode：

2903399090

Characteristics

PSA：

XLogP3：

1.21 (est)

Appearance：

Tetrafluoroethylene, stabilized appears as a 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.

Density：

1.519 g/cm³ @ Temp: -76 °C

Melting Point：

-142.5 °C

Boiling Point：

-75.9 °C

Flash Point：

<32 deg F (<0 deg C) (closed cup) /Tetrafluoroethylene, inhibited/

Refractive Index：

1.241

Water Solubility：

In water, 1.59X10+2 mg/L at 25 deg C

Storage Conditions：

Store in a cool, dry, well-ventilated location. Separate from oxidizing materials, air, sulfur trioxide, halogen compounds. Outside or detached storage is preferred. /Tetrafluoroethylene, inhibited/

Vapor Pressure：

22800 mmHg at 70°F

Vapor Density：

3.87

Toxicity：

Inhalation-rat LC50: 40000PPM/4 hours; inhalation-mouse LC50: 143000 mg/m3/4 hours

Flammability characteristics：

Flammable; decomposes toxic hydrogen fluoride gas when exposed to heat; prevents burns

Explosive limit：

Explodes when heated. /Tetrafluoroethylene, inhibited/

Odor：

Odorless

Safety Information

Hazard category：

2.1

Transport codes：

1081

hazard class code：

safety instructions：

16-36/37/39-45

Marks：

C,F

Storage features：

Treasury is ventilated, low temperature and dry; stored separately from oxidant

Hazard note：

Corrosive/Flammable

Explosive characteristics：

Explosive when mixed with air

Stability/Shelf Life：

Stable. Reactive when heated.

Precautionary statement(s)：

P201, P202, P281, P308+P313, P405, P501

Hazard Statements：

H350I

Toxicity

Toxicity class：

practically nontoxic

Tetrafluoroethylene Use and Manufacturing

Methods of Manufacturing

The preparation of tetrafluoroethylene is obtained by thermal cracking of difluorochloromethane at high temperature. Reaction equation: 2CHClF2→CF2=CF2+2HCl adopts platinum-lined tube as the cracking reaction tube and superheated steam as the diluent, and is cracked at a temperature of 600-900 ℃ to obtain tetrafluoroethylene. After cooling and separation, and then washed with water and alkali to remove hydrogen chloride, and then pressurized and rectified at -20 ℃, 2.02 MPa, the polymer grade pure product with a content of 99.9% or more can be obtained.

Uses

In manufacture of polymers and synthesis of fluorinated refrigerants, dielectric media and solvents.In vinyl polymerization, cycloalkylation and addition reactions.

Computed Properties

Molecular Weight:100.01
XLogP3:1.3
Hydrogen Bond Acceptor Count:4
Exact Mass:99.99361265
Monoisotopic Mass:99.99361265
Heavy Atom Count:6
Complexity:55.6
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

Chlorodifluoromethane

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CAS No.: 116-14-3

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