Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

The test substance is not readily biodegradable and was found to (bio)degrade only very slowly in natural surface water with a DT50 between 179 and 464 days (i.e. the substance is not rapidly degradable). Due to the low octanol water partition coefficient (log Pow = -1.13), the substance is not expected to bioaccumulate or cause any secondary poisoning, neither is significant adsorption of the test substance to particulate matter expected. The calculated Henry's Law constant (between 2.93E-06 and 3.2E-06 Pa.m3/mol at 25°C) indicates that the test substance will predominantly be in the water phase. The Koc of the substance was predicted to be 15 L/kg, using the calculation method of Franco and Trapp (2008) for ionisable organic molecules.

According to a QSAR exercise using CRAFT (for prediction of potential transformation products of representative components) and EPI Suite models (for prediction of biodegradability and log Pow (as an indication of potential for bioaccumulation)), the potential (bio)degradation products of the components of the UVCB are in general not readily biodegradable and all have no or a low potential for bioaccumulation.

Additional information