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Environmental fate & pathways

Phototransformation in water

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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).