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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 QSAR calculated rate constant for the OH sensitized photodegradation of cis-cyclooctene is approximately 6.43E-11 cm3/(molecule * s). At 500,000 OH radicals / cm3 (approximate 24-hour mean in central Europe), this corresponds to a half-life of 6 hours. The QSAR calculated rate constant for the ozone sensitized photodegradation of cis-cyclooctene is approximately 2.0E-16 cm3/(molecule * s). At 7.0E+11 O3 molecules / cm3, this corresponds to a half-life of 1.375 hours. Referring to 24 hour-days the half-life will be twice as long, i.e. 2.75 hours. The overall half-life will therefore be about 2 hours.

Key value for chemical safety assessment

Half-life in air:
2 h

Additional information