Tetrachloroethylene

Tetrachloroethylene
	Carbon, C Chlorine, Cl
Names
	Preferred IUPAC name Tetrachloroethene
	Other names Carbon dichloride (Carboneum Dichloratum); Dicarbon tetrachloride; PCE; Perc; Perchloroethene; Perchloroethylene; Chlorethose
Identifiers
CAS Number	127-18-4 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	1304635
ChEBI	CHEBI:17300 ;
ChEMBL	ChEMBL114062 ;
ChemSpider	13837281 ;
ECHA InfoCard	100.004.388
EC Number	204-825-9;
Gmelin Reference	101142
KEGG	C06789 ;
PubChem CID	31373;
RTECS number	KX3850000;
UNII	TJ904HH8SN ;
UN number	1897
CompTox Dashboard (EPA)	DTXSID2021319 ;
	InChI InChI=1S/C2Cl4/c3-1(4)2(5)6 Key: CYTYCFOTNPOANT-UHFFFAOYSA-N ; 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
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)
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	Mild skin and respiratory irritant
	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)	2 0 0
Flash point	Not flammable
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	3420 mg/kg (oral, rat); 2629 mg/kg (oral, rat), >10000 mg/kg (dermal, rat)
LC50 (median concentration)	4000 ppm (rat, 4 hr); 5200 ppm (mouse, 4 hr); 4964 ppm (rat, 8 hr)
	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
REL (Recommended)	Ca Minimize workplace exposure concentrations.
IDLH (Immediate danger)	Ca [150 ppm]
Safety data sheet (SDS)	External MSDS
Related compounds
Related organohalides	Tetrafluoroethylene ; Tetrabromoethylene; Tetraiodoethylene
Related compounds	Trichloroethylene; Dichloroethylene; 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). verify (what is ?) Infobox references

Tetrachloroethylene, also known under the systematic name tetrachloroethene, or perchloroethylene, and abbreviations such as "perc" (or "PERC"), and "PCE", is a chlorocarbon with the formula Cl₂C=CCl₂. It is a colorless 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 1 part per million (1 ppm).

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