Registration Dossier

Environmental fate & pathways

Phototransformation in air

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Description of key information

The half life of propylene oxide due to the reaction with hydroxyl radicals is 32 days.

Key value for chemical safety assessment

Half-life in air:
32 d

Additional information

Propylene oxide reacts with hydroxyl radicals in the atmosphere. The rate of this reaction has been determined by a number of investigators. As a reasonable worst-case the longest half-life, 32 days (EU RAR, 2002), will be used in the assessment.