Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Trichloroethylene is a colourless liquid with a characteristic odour, resembling that of chloroform, and has a melting point of -84.8 °C and a boiling point of 86.7 °C at 760 mm Hg. The relative density of trichloroethylene at 20 ºC is 1.49. (All: Merck Index, 1989).

 

The vapour pressure is 9.9 kPa at 25 °C. The octanol/water partition coefficient (log Pow) is 2.53 at 20 °C, the water solubility is 1100 mg/l at 20 ºC. (All: Illustrated Handbook of Physical-Chemical Properties and Environmental Fate for Organic Chemicals, 1993).  

 

In accordance with column 2 of REACH Annex X, data on the particle size are not needed as the substance is a liquid. Based on its structure, trichloroethylene is not expected to be surface active. The substance remains undissociated in water as it does not contain chemical groups which are capable of dissociation. In accordance with column 1 of REACH Annex IX, the study is not required, as the stability of the substance is not considered to be critical. The substance is a chlorinated hydrocarbon. This kind of substances usually does not react with common organic solvents like alkanes, alcohols, ketones, aromatic hydrocarbons and halogenated hydrocarbons.

Trichloroethylene has a self-ignition temperature of 420 ºC (Lange’s Handbook of Chemistry, 1992) and is non-flammable (Merck Index, 1989). It also does not have pyrophoric properties and does not react with water. Based on this, the substance does not need to be classified as flammable according to EU Directive 67/584/EEC and EU Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation (EC) No. 1272/2008. The substance does not contain chemical groups associated with explosive or oxidizing properties, therefore classification for these hazards is not warranted according to EU Directive 67/584/EEC and EU Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation (EC) No. 1272/2008.