Chemical

Products

Chloroform

Cas Number

67-66-3

Other Names

Chloroform

Methane trichloride

Methyl trichloride

Methenyl trichloride

TCM

Freon 20

Refrigerant-20

R-20

UN 1888

The formula

CHCl3

Introduction

Chloroform, or trichloromethane, is an organic compound with formula CHCl3. It is a colorless, sweet-smelling, dense liquid that is produced on a large scale as a precursor to PTFE. It is also a precursor to various refrigerants. It is one of the four chloromethanes and a trihalomethane.

Physical and Chemical Properties
Appearance Colorless liquid
Molar mass 119.37 g·mol−1
Odor Heavy, ethereal odor
Density 1.564 g/cm3 (−20 °C), 1.489 g/cm3 (25 °C), 1.394 g/cm3 (60 °C)
Melting point −63.5 °C (−82.3 °F; 209.7 K)
Boiling point 61.15 °C (142.07 °F; 334.30 K), decomposes at 450 °C
Solubility in water 10.62 g/L (0 °C), 8.09 g/L (20 °C), 7.32 g/L (60 °C)
Solubility Soluble in benzene, Miscible in diethyl ether, oils, ligroin, alcohol, CCl4, CS2
Solubility in acetone ≥ 100 g/L (19 °C)
Solubility in dimethyl sulfoxide ≥ 100 g/L (19 °C)
Applications

1. Most of the total production of chloroform is used to produce monochlorodifluoromethane (CFC22) which is used as a refrigerant but also as an intermediate in the manufacture of tetrafluoroethene which then may be polymerised (PTFE).

2. Chloroform is also used in the production of dyes, pharmaceuticals and pesticides. Its use as a solvent and application in anaesthesia is rapidly on the decline.