Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Based on calculations according to AOPWIN v1.92, the substance is indirectly photodegraded by reaction with hydroxyl radicals in the atmosphere with half-lifes ranging of about 0.5 hours, taking into account a 12-h day and a mean OH radical concentration of 1.5 E6 radicals per cm³.

A study on the hydrolysis is available for a close structural analogue (CAS 16090-02-1) that demonstrates that the test substance is stable (hydrolysis < 10 %) at pH 4, 7 and 9 at 50 °C and that the half life of the tested substance for hydrolysis is proved to be greater than 1 year (CIBA-GEIGY 1992).

Therefore, it is assumed that the substance CAS 133-66-4 is stable in water as well.