Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Abiotic degradation

 

C12-14 ADMAESis readily biodegradable and therefore data on hydrolysis is not required in accordance with Annex IX column 2 adaptation of REACH. However, the read-across substance C12-18 TMAC was shown to behydrolyticallystable since more than 90% of the test substance remained intact at pH 5, 6.2, 7 and 9 tested over a 30-day period. Abiotic degradation is therefore considered to be of limited relevance for the environmental fate of C12-14 ADMAES.

 

Biotic degradation

A reliable OECD guideline ready biodegradation study has shown C12-14 ADMAESto be readily biodegradable, with 68% biodegradation within 28 days. This suggests that the substance degrades in the environment under aerobic conditions without the formation of persistent degradation products. This fate process is considered the most relevant for C12-14 ADMAESin the aquatic and terrestrial environment.

Biodegradation in water and sediment

In a continuous activated sludge (CAS) test with the read-across substance C12-16 ADBAC, a total mean removal of 99.998%, with 0.016 to 0.023% removal via adsorption to sludge, was observed. The same is expected for C12-14 ADMAES.

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. The same biodegradation behaviour is expected for C12-14 ADMAES.