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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Estimated half-life in the atmosphere based on reaction with hydroxyl radicals.  

Key value for chemical safety assessment

Half-life in air:
0.2 d

Additional information



The estimated half-lifes for 1,3 -cyclohexanedicarboxyaldehyde and

1,4 cyclohexanedicarboxyaldehyde) were estimated as 0.152 days and 0.168 days, respectively, in the atmosphere based on reaction with hydroxyl radicals using the Atmospheric Oxidation Program in EPA EPI Suite . In consideration of the mixture of  

1,3 -cyclohexanedicarboxyaldehyde and 1,4 -cyclohexanedicarboxyaldehyde in Unoxol, it will estimated that half-life of Unoxol will be 0.2 days.