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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Phototransformation in water

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Administrative data

Link to relevant study record(s)

Description of key information

Degradation of tetrachloroethylene in water by photolysis is slow, with a half-life of 268 days.

Key value for chemical safety assessment

Half-life in water:
268 d

Additional information

Photolysis is not likely to be a significant removal process for tetrachloroethylene. Tetrachloroethylene (1 mg/l) in water was degraded by 59 -65% after one year in the dark and by 75 -76% in the presence of sunlight (Dilling et al., 1975).