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−1
Appearance	Colourless liquid
Odor	mild, chloroform-like
Density	1.37 g/cm3 (0 °C (32 °F; 273 K)); 1.35 g/cm3 (15 °C (59 °F; 288 K)); 1.32 g/cm3 (30 °C (86 °F; 303 K));
Melting point	−33 °C (−27 °F; 240 K)
Boiling point	74–76 °C (165–169 °F; 347–349 K)
Solubility in water	0.480 g/L (20 °C (68 °F; 293 K)); reacts slowly producing hydrochloric acid;
log P	2.49 (20 °C (68 °F; 293 K))
Vapor pressure	100 mmHg (13 kPa) (20 °C (68 °F; 293 K))
Refractive index (nD)	1.437 D
Viscosity	0.86 cP (20 °C (68 °F; 293 K))
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H332, H350, H402, H420
Precautionary statements	P201, P202, P261, P271, P273, P280, P304+P340+P312, P308+P313, P405, P501, P502
NFPA 704 (fire diamond)	2 1 0
Autoignition; temperature	537 °C; 998 °F; 810 K
Explosive limits	7.5%–15%
Threshold limit value (TLV)	350 ppm (1,4-dioxane: 20 ppm, danger of cutaneous absorption) (TWA), 450 ppm (STEL), 350 ppm (1900 mg/m3) (C)
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	1,1,1-TCA:; 9600 mg/kg (oral, rat); 6000 mg/kg (oral, mouse); 5660 mg/kg (oral, rabbit); 1,4-dioxane (stabilizer):; 7600 μL/kg (skin, rabbit);
LC50 (median concentration)	3911 mg/kg (mouse, 2 hr); 18,000 ppm (rat, 4 hr);
	NIOSH (US health exposure limits):
PEL (Permissible)	350 ppm (1900 mg/m3, TWA); 1,4-dioxane: 100 ppm (360 mg/m3, TWA, skin);
REL (Recommended)	350 ppm (1900 mg/m3, C); 1,4-dioxane: 1 ppm (3.6 mg/m3, C, potential carcinogen, skin absorption);
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.