Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

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.

Several studies are available on the hydrolysis of propylene oxide. Meylan et al. (1986) determined hydrolysis kinetics of propylene oxide based on various experimentally determined values.At 25°C the calculated half-life of propylene oxide is 12.9 days in freshwater and 2.4 days in seawater . Due to a specific reaction with chloride ions, the hydrolysis rate in seawater is higher.