Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Fate

Ethoxylated quaternary methylammonium chlorides are cations. This means that they will sorb strongly to negatively charged surfaces like glassware, soil and sediment. If emitted to the environment they are expected to end up in sludge, and possibly in soil and sediments. However, the substance is biodegradable which will limit the fraction going to sludge, soil and sediment. > 99.99% removal (primarily through biodegradation) was demonstrated in a CAS test. The substance is not expected to evaporate.

Abiotic degradation

A hydrolysis test has been waived because the substance is readily biodegradable in accordance with column 2 of Annex VIII of Regulation 1907/2006/EC. According to EPIWIN calculations the reaction with OH-radicals in air would result in a half-life time in air in the order of a few hours.

Biodegradation

In two ready biodegradation studies according to OECD TG 301D (GLP, reliability 1) > 60% biodegradation was found after 28 days. In a Continuous Activated Sludge study > 99.99% removal was observed after 48 days. Chemical analysis confirmed that removal was predominantly by biodegradation. The studies demonstrate that the substance is readily biodegradable and almost complete biodegradation occurs in the waste water in biological wastewater treatment plants.

Bioaccummulation

The substance is expected to have a low bioaccumulation potential based on the low log Kow. Log Kow is reported as -0.12.

Transport and distribution

The adsorption coefficient (Kd) of the substance has been determined to be in the range of 377 - 5863 L/kg for three different soils in a test according to OECD TG 106.