Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Abiotic degradation

C16 TMAC is inherently biodegradable and therefore data on hydrolysis is not required. The read-across substance C12-18 TMAC was shown to be hydrolytically stable. Abiotic degradation is therefore considered to be of limited relevance also for the environmental fate of C18 TMAC.

Biotic degradation

Reliable OECD guideline studies have C18 TMAC to be inherently biodegradable. The read-across substance C16-18 and C18-unsatd. TMAC is readily biodegradable. Therefore, biodegradation under aerobic conditions is considered the most relevant fate process in the aquatic and terrestrial environment for C18 TMAC.

In a continuous activated sludge (CAS) test, a total mean removal of 99.998%, with 0.016 to 0.023 % removal via adsorption to sludge, was observed with the read across substance C12-16 ADBAC. C18 TMAC is expected to follow the same biodegradation profile in water and sediment.

Biodegradation in soil

A biodegradation study resulted in 64% biodegradation of the read-across substance C12-16 ADBAC in a loam soil at Day 70, with a DT50 value of 40 days. Based on the adopted read-across approach, C18 TMAC is expected to follow the same biodegradation profile in soil.