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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Phototransformation in air

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Administrative data

Link to relevant study record(s)

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.