Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Ethyl 3,5 -dichloro-4 -hexadecyloxycarbonyloxybenzoate (AF-366) is a non-volatile (vapour pressure < 1.6 x 10-8 Pa at 25 °C) substance, which is expected to undergo rapid, indirect photodegradation if released into the air (half-life = 16.5 hours). This substance is not readily biodegradable, however, considering the stringency of the ready biodegradability test method and the rapid abiotic degradation of the substance via hydrolysis at pH 4 and 7 (26 and 219 hours, respectively), degradation in the environment can be expected to occur to a considerable extent. Nevertheless, the substance is hydrolytically stable at pH 9 (half-life 47.8 days). Based on the log Pow (> 9.3) and the estimated BCF/BAF values (11.5-251 and 1878 L/kg ww), AF-366 shows potential for bioaccumulation in biota. The substance shows a tendency for adsorption to solid particles in view of its log Koc value (8.4) and will therefore mainly be distributed into the soil and sediment compartments if released into the environment.