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Environmental fate & pathways

Phototransformation in water

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Administrative data

Link to relevant study record(s)

Description of key information

The screening experiment for the sunlight direct photolysis of CBS in pure water gave a first-order rate constant of 4.4 (±0.1)*10-6 sec-1 at midday in August, which corresponds to a half-life of 26 minutes (Monsanto, 1980).

Key value for chemical safety assessment

Additional information

The values mentioned above refer to the top millimetres of a water body in summer, because of factors like cloudiness, shadowing effects of vegetation, absorption and scattering of light by suspended solids etc. The actual environmental lifetime is certainly longer.