1,1,1-Trichloroethane

1,1,1-Trichloroethane
Names
	Preferred IUPAC name 1,1,1-Trichloroethane
	Other names 1,1,1-TCA, Methyl chloroform, Chlorothene, Solvent 111, R-140a, Genklene, monochlorethylidene chloride (archaic)
Identifiers
CAS Number	71-55-6 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:36015 ;
ChEMBL	ChEMBL16080 ;
ChemSpider	6042 ;
ECHA InfoCard	100.000.688
EC Number	200-756-3;
Gmelin Reference	82076
IUPHAR/BPS	5482;
KEGG	C18246 ;
PubChem CID	6278;
RTECS number	KJ2975000;
UNII	113C650IR1 ;
UN number	2831
CompTox Dashboard (EPA)	DTXSID0021381 ;
	InChI InChI=1S/C2H3Cl3/c1-2(3,4)5/h1H3 Key: UOCLXMDMGBRAIB-UHFFFAOYSA-N ; InChI=1/C2H3Cl3/c1-2(3,4)5/h1H3 Key: UOCLXMDMGBRAIB-UHFFFAOYAP;
	SMILES ClC(Cl)(Cl)C;
Properties
Chemical formula	C2H3Cl3 or CH3CCl3
Molar mass	133.40 g/mol
Appearance	Colourless liquid
Odor	mild, chloroform-like
Density	1.32 g/cm3
Melting point	−33 °C (−27 °F; 240 K)
Boiling point	74 °C (165 °F; 347 K)
Solubility in water	0.4% (20 °C); 0.480 g/litre at 20 °C
Vapor pressure	100 mmHg (20°C)
Refractive index (nD)	1.437
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Ozone layer impact. Irritant to the upper respiratory tract. Causes severe irritation and swelling to eyes.
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H332, H420
Precautionary statements	P261, P271, P304+P312, P304+P340, P312, P502
NFPA 704 (fire diamond)	2 1 0
Explosive limits	7.5–12.5%
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	9600 mg/kg (oral, rat); 6000 mg/kg (oral, mouse); 5660 mg/kg (oral, rabbit)
LC50 (median concentration)	3911 ppm (mouse, 2 hr); 18000 ppm (rat, 4 hr)
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 350 ppm (1900 mg/m3)
REL (Recommended)	C 350 ppm (1900 mg/m3) [15-minute]
IDLH (Immediate danger)	700 ppm
	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

1,1,1-Trichloroethane, also known as methyl chloroform and chlorothene, is a chloroalkane with the chemical formula CH₃CCl₃. It is an isomer of 1,1,2-trichloroethane. A colourless and sweet-smelling liquid, it was once produced industrially in large quantities for use as a solvent. It is regulated by the Montreal Protocol as an ozone-depleting substance and as such use has declined since 1996. Trichloroethane should not be confused with the similar-sounding trichloroethene which is also commonly used as a solvent.