Tetrachloroethylene

Tetrachloroethylene

Carbon, C   Chlorine, Cl
Names
Preferred IUPAC name Tetrachloroethene
Other names Carbon bichloride; Carbon dichloride (Carboneum Dichloratum); Dicarbon tetrachloride;[1] Ethylene tetrachloride; Perchlor; Perchloroethene; Perchloroethylene; Chlorethose[2]
Identifiers
CAS Number	127-18-4 Y
3D model (JSmol)	Interactive image
Abbreviations	PCE; Perc; Per
Beilstein Reference	1304635
ChEBI	CHEBI:17300 N
ChEMBL	ChEMBL114062 Y
ChemSpider	13837281 Y
ECHA InfoCard	100.004.388
EC Number	204-825-9
Gmelin Reference	101142
KEGG	C06789 Y
PubChem CID	31373
RTECS number	KX3850000
UNII	TJ904HH8SN Y
UN number	1897
CompTox Dashboard (EPA)	DTXSID2021319
InChI InChI=1S/C2Cl4/c3-1(4)2(5)6 Y Key: CYTYCFOTNPOANT-UHFFFAOYSA-N Y InChI=1/C2Cl4/c3-1(4)2(5)6 Key: CYTYCFOTNPOANT-UHFFFAOYAO
SMILES ClC(Cl)=C(Cl)Cl
Properties
Chemical formula	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)
Solubility in water	0.15 g/L (25 °C)
Vapor pressure	14 mmHg (20 °C)[3]
Magnetic susceptibility (χ)	−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:
Pictograms
Signal word	Warning
Hazard statements	H351, H411
Precautionary statements	P201, P202, P273, P281, P308+P313, P391, P405, P501
NFPA 704 (fire diamond)	[7] 2 0 0
Flash point	Not flammable
Lethal dose or concentration (LD, LC):
LD50 (median dose)	3420 mg/kg (oral, rat)[4] 2629 mg/kg (oral, rat), >10000 mg/kg (dermal, rat)[5]
LC50 (median concentration)	4000 ppm (rat, 4 hr) 5200 ppm (mouse, 4 hr) 4964 ppm (rat, 8 hr)[6]
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). N verify (what is YN ?) Infobox references

Tetrachloroethylene, also known as perchloroethylene^[a] 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]

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