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Environmental fate & pathways

Phototransformation in water

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Link to relevant study record(s)

Description of key information

Castro & Belser, 1985, was awarded the reliability score of 2 according to the criteria of Klimisch et al, 1997. Castro & Belser, 1985, was therefore considered to adequately address this endpoint.

Key value for chemical safety assessment

Half-life in water:
380 d

Additional information

Castro & Belser, 1985, was conducted in a similar manner to the draft OECD Phototransformation of Chemicals in Water - Direct and Indirect Photolysis guideline. The study was performed in freshwater at 22 ºC for a period of 2 hours. Extrapolated DT50 values were 380 days in roof sunlight and 7.6 minutes under artificial light (450 -W medium-pressure mercury lamp) with 10% degradation at 53 days under roof sunlight.