Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Biodegradation in water:

Information derived from screening tests: A mixture of the registered substance and a close homologue was readily biodegradable according to the OECD test guideline 301B.

Reading this result across, the registered substance is considered as being readily biodegradable according to the OECD test guideline 301B.

Information derived from simulation tests: The removal rate of the substance was determined under WWTP simulation conditions in the OECD 303A test. The substance exhibited a removal rate of 99.74 % (based on substance specific analysis).

The substance is very effectively removed from waste water by biodegradation. Under the condition of the CAS test the substance has a half life (DT50) of 0.0298 [d], i.e. the biodegradation rate is 23.25 [6 hours] resp. 93 [d].

Biodegradation in soil:

In two GLP studies (according to EPA 540/9-82-021, Subdivision N, Section 162-1 and German BBA guideline Part IV, 4-1) the test substance was mineralized to C02 in four soils to >70% of the applied radioactivity after 4 days.

Depending on the type of soil, the DT-50 values were in the range of 0.02 to 0.27 days, i.e. 0.5 to approx 6.5 hours.

Only two metabolites reached levels above 10% of the applied radioactivity. Their maximum value was at the first day and amounted to < 2 % after day 4.

For risk assessment purposes, the worst case of 6.5h was used. This corresponds to a biodegradation rate of 2.56 [per day].

Biodegradation in sediment:

As the substance is readily biodegradable in water, simulation testing on ultimate degradation in surface water and sediment simulation testing does not need to be conducted according to the REACH regulation Annex IX (9.2.1.4 and 9.2.1.2).