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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 kinetic rate constant for the reaction of cyclohexane with OH radicals is measured to be 7.38 E-12 cm3/mol/s, indicating that the atmospheric half-life would be 52 hours.

Key value for chemical safety assessment

Half-life in air:
52 h

Additional information

Atkinson (1985) is a review article, with no data reported on the test methods or conditions of the original data source. Never-the-less, the data are taken from a published, peer-reviewed journal article and are considered to be suitable for this endpoint. The measured results provide a rate constant of the reaction of cyclohexane with OH radicals of 7.38 E-12 cm3/mol/s. The results indicate that the substance would have an atmospheric half-life of approximately 52 hours and therefore would not be persistent in the atmospheric compartment. The study (Atkinson 1989) is also a peer reviewed source and reports an atmospheric half-life of 15.14 hours.