Tetrachloroethylene
Chemical compound in very wide use / From Wikipedia, the free encyclopedia
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Tetrachloroethylene, also known as perchloroethylene[lower-alpha 1] or under the systematic name tetrachloroethene, and abbreviations such as perc (or PERC), and PCE, is a chlorocarbon with the formula Cl2C=CCl2. It is a non-flammable, stable, colorless and heavy liquid widely used for dry cleaning of fabrics, hence it is sometimes called "dry-cleaning fluid". It also has its uses as an effective automotive brake cleaner. It has a mild sweet, sharp odor, detectable by most people at a concentration of 50 ppm.[8]
Quick Facts Names, Identifiers ...
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Names | |||
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Preferred IUPAC name
Tetrachloroethene | |||
Other names | |||
Identifiers | |||
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3D model (JSmol) |
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Abbreviations | PCE; Perc; Per | ||
1304635 | |||
ChEBI | |||
ChEMBL | |||
ChemSpider |
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ECHA InfoCard | 100.004.388 | ||
EC Number |
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101142 | |||
KEGG |
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PubChem CID |
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RTECS number |
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UNII | |||
UN number | 1897 | ||
CompTox Dashboard (EPA) |
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Properties | |||
C2Cl4 | |||
Molar mass | 165.82 g/mol | ||
Appearance | Clear, very refractive, colorless liquid | ||
Odor | Mild, sharp and sweetish[3] | ||
Density | 1.622 g/cm3 | ||
Melting point | −22.0 to −22.7 °C (−7.6 to −8.9 °F; 251.2 to 250.5 K) | ||
Boiling point | 121.1 °C (250.0 °F; 394.2 K) | ||
0.15 g/L (25 °C) | |||
Vapor pressure | 14 mmHg (20 °C)[3] | ||
−81.6·10−6 cm3/mol | |||
Refractive index (nD) |
1.505 | ||
Viscosity | 0.89 cP at 25 °C | ||
Hazards | |||
Occupational safety and health (OHS/OSH): | |||
Main hazards |
Inhalation of vapours can cause anaesthesia and respiratory irritation. Causes irritation in contact with skin and eyes with no residual injury. | ||
GHS labelling: | |||
Warning | |||
H351, H411 | |||
P201, P202, P273, P281, P308+P313, P391, P405, P501 | |||
NFPA 704 (fire diamond) | |||
Flash point | Not flammable | ||
Lethal dose or concentration (LD, LC): | |||
LD50 (median dose) |
3420 mg/kg (oral, rat)[5] 2629 mg/kg (oral, rat), >10000 mg/kg (dermal, rat)[6] | ||
LC50 (median concentration) |
4000 ppm (rat, 4 hr) 5200 ppm (mouse, 4 hr) 4964 ppm (rat, 8 hr)[7] | ||
NIOSH (US health exposure limits): | |||
PEL (Permissible) |
TWA 100 ppm C 200 ppm (for 5 minutes in any 3-hour period), with a maximum peak of 300 ppm[3] | ||
REL (Recommended) |
Ca Minimize workplace exposure concentrations.[3] | ||
IDLH (Immediate danger) |
Ca [150 ppm][3] | ||
Safety data sheet (SDS) | External MSDS | ||
Related compounds | |||
Related analogous organohalides |
Tetrafluoroethylene Tetrabromoethylene Tetraiodoethylene | ||
Related compounds |
Trichloroethylene Dichloroethylene 1,1,2,2-Tetrachloroethane Carbon tetrachloride | ||
Supplementary data page | |||
Tetrachloroethylene (data page) | |||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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