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Environmental fate & pathways

Phototransformation in air

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Description of key information

The test substance (diflufenzopyr sodium salt) degrades in the atmosphere with a DT50 value of 0.233 days (24-hr day; corresponding to 5.593 hours). As the test substance contains no olefinic carbon-carbon double and acetylic triple bonds, it is not expected to react with ozone.

Key value for chemical safety assessment

Half-life in air:
0.233 d

Additional information

The photochemical and oxidative decompositions of the test substance (diflufenzopyr sodium salt) in air was calculated according to Atkinson using EpiWIN software (AOP program v1.92). The test substance degrades in the atmosphere with a DT50 value of 0.233 days (24-hr day; corresponding to 5.593 hours). As the test substance contains no olefinic carbon-carbon double and acetylic triple bonds, it is not expected to react with ozone.