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Environmental fate & pathways

Phototransformation in soil

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Description of key information

DT50 = 34 d in summer sunlight (50° North) (EPA Guideline Subdivision N, 161-3)

Key value for chemical safety assessment

Additional information

The photodegradation of the substance in soil was investigated in a study conducted according to EPA Guideline Subdivision N 161-3 (Mislankar, 1999). The substance was applied on a sandy loam soil and the soil samples irradiated for 32 days (12:12 h light/darkness). The results were compared with a second set of soil samples that was kept in permanent darkness. A half-life of 34 days in artificial sunlight and 48 days in permanent darkness was recorded for the test substance. The main degradation products were sulfone and sulfonic acid.