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Environmental fate & pathways

Phototransformation in air

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Description of key information

The photochemical half-life of degradation in air was estimated to be 4.47 days.

Key value for chemical safety assessment

Half-life in air:
4.47 d

Additional information

Following the Atkinson approach, the photochemical half-life of the test substance in air was estimated, with smiles notation, by calculation with the software Atmospheric Oxidation Program (AOPWIN, version 1.92). For a given concentration of hydroxyl radicals (0.5* 106 OH radicals/cm3, 24h) and an overall rate constant of 3.5924* 10-12 for the various photolytic transformation processes induced by OH radicals the photolytic half life of the substance in the atmosphere is estimated to 4.47 days. Therefore, the test substance is regarded as degradable by photolytically induced processes in air.