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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

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Environmental fate & pathways

Phototransformation in water

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Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

Available publications give clear indication of relevant photodegradation processes of benzotriazole in aqueous solutions under acidic and neutral pH conditions. Under basic conditions the ionic form of benzotriazole, strictly speaking benzotriazolate, is dominant showing a reduced reactivity to UV light.

Hem et al. identified aniline, phenazine and supposedly an oxidation product of phenazine as relevant transformation products. Based on these findings it can be assumed that photodegradation in water enhances the detoxification and biodegradability of benzotriazoles.