1,1,1,2-Tetrachloroethane is a chlorinated hydrocarbon. It is a colorless liquid with a sweet chloroform-like odor. It is used as a solvent and in the production of wood stains and varnishes. It is an isomer of 1,1,2,2-tetrachloroethane.

Quick Facts Names, Identifiers ...

1,1,1,2-Tetrachloroethane^[1]

Names
Preferred IUPAC name 1,1,1,2-Tetrachloroethane
Other names R-130a; acetylidene tetrachloride, asymmetrical tetrachloroethane
Identifiers
CAS Number	630-20-6 Y
3D model (JSmol)	Interactive image Interactive image
ChEBI	CHEBI:34024 Y
ChEMBL	ChEMBL155816 Y
ChemSpider	11911 Y
ECHA InfoCard	100.010.124
KEGG	C14705 Y
PubChem CID	12418
UNII	0S5MKE574X Y
CompTox Dashboard (EPA)	DTXSID2021317
InChI InChI=1S/C2H2Cl4/c3-1-2(4,5)6/h1H2 Y Key: QVLAWKAXOMEXPM-UHFFFAOYSA-N Y InChI=1/C2H2Cl4/c3-1-2(4,5)6/h1H2 Key: QVLAWKAXOMEXPM-UHFFFAOYAE
SMILES C(C(Cl)(Cl)Cl)Cl ClCC(Cl)(Cl)Cl
Properties
Chemical formula	C2H2Cl4
Molar mass	167.84 g·mol−1
Appearance	Clear liquid
Density	1.5532 g/cm3
Melting point	−70.2 °C (−94.4 °F; 203.0 K)
Boiling point	130.5 °C (266.9 °F; 403.6 K)
Solubility in water	0.1% (20°C)[2]
Vapor pressure	14 mmHg (25°C)[2]
Hazards
NIOSH (US health exposure limits):
PEL (Permissible)	none[2]
REL (Recommended)	Handle with caution in the workplace.[2]
IDLH (Immediate danger)	N.D.[2]
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

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1,1,1,2-Tetrachloroethane can be obtained by a two-step addition reaction of acetylene with chlorine (via dichloroethene), but this mainly produces 1,1,2,2-tetrachloroethane.

C₂H₂ + Cl₂ → C₂H₂Cl₂

C₂H₂Cl₂ + Cl₂ → C₂H₂Cl₄

It can be obtained directly by chlorination of 1,1,2-trichloroethane:^[3]

CHCl₂−CH₂Cl + Cl₂ → CCl₃−CH₂Cl + HCl

IARC has classified 1,1,1,2-tetrachloroethane as a possible carcinogen for humans in 2014.^[4]

• 1,1,2,2-Tetrachloroethane