Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

The stability of cloquintocet-mexyl has been tested for hydrolysis, phototransformation in water and phototransformation in soil. In hydrolysis studies, cloquintocet-mexyl has been found to be subject to de-esterification, and the corresponding acid (i.e. Acetic acid, 2-[(5-chloro-8-quinolinyl)oxy]-; CAS#: 88349-88-6) was the sole hydrolysis product identified. The rate of hydrolysis varies from very rapid in strongly alkaline solution to very slow for pH ranging from 5 to 9. Photodegradation of cloquintocet-mexyl in water was found to be rapid, with a half-life of 0.62 days under summer sunlight conditions at 30° N (assuming 12 hours a day). Results suggest that photolysis on soil surfaces is not likely to significantly enhance the already very fast microbial degradation of cloquintocet-mexyl in soils.

Additional information