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Environmental fate & pathways

Phototransformation in air

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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.