Registration Dossier

Environmental fate & pathways

Phototransformation in air

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Administrative data

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Description of key information

After evaporation or exposure to the air, the product will be slowly degraded by photochemical processes with OH-radicals.

Key value for chemical safety assessment

Half-life in air:
77 h

Additional information

Based on the calculation according to SRC AOP v1.92,d-valerolactone is indirectly photodegraded by reaction with hydroxyl radicals in the atmosphere with a half-life (t1/2) of about 77 hours taking into account a 24-h day and a mean OH radical concentration of 5.0E+05 molecules per cm³ (BASF 2011).