Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Homosalate proved to be inherently biodegradable in a test based on OECD 302C.

As homosalate hydrolyses quite fast under environmental conditions (pH7) with a half-life of only 9 days, the substance can be regarded as rapidly degradable under environmental conditions. With a half-life time of < 16 days the criteria for rapid degradation according to the CLP/GHS criteria are as well fulfilled as the degradation products salicylic acid (2-hydroxylbenzoic acid) [CAS 69-72-7] and 3,3,5-trimethylcyclohexanol [CAS 116-02-9] are not classified as hazardous to the aquatic environment. A persistence of homosalate in the environment is therefore not expected.

The substance is only slightly volatile from the water surface under environmental conditions (estimated Henry’s law constant: 1.96 Pa· m3/mol).

Due to the calculated high log Koc of 3.8 (MCI Method) the substance is considered to be immobile in soil and sediments according to the classification scheme of McCall et al. (1981).

Despite the high log Kow of 6.34, bioaccumulation in aquatic species is not expected as the BCF estimated with the method of Arnot and Gobas is 224.4 L/kg ww considering that the substance has a half-life in fish of less than a day.