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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

In a closed bottle test according to OECD guideline 301, no biodegradation was observed.

Additional information

A ready biodegradability test with the test item in mineral oil was performed which allows the biodegradability to be measured in an aerobic aqueous medium. The ready biodegradability was determined in the Closed Bottle test performed according to OECD guideline 301 and EU method C.6. The test was prolonged because the pass level was not reached at day 28.
Slight inhibition of the endogenous respiration of the inoculum by the test substance and mineral oil was detected. Therefore, inhibition of the biodegradation due to the "high" initial concentrations may occur.
The test item in solvent was biodegraded 4 % at day 28 in the Closed Bottle test. In the prolonged Closed Bottle test this compound was biodegraded 0 % at day 140. Under the test conditions chosen, no biodegradation was observed.

The validity of the test is demonstrated by an endogenous respiration of 1.6 mg/L at day 28. Furthermore, the differences of the replicate values at day 28 were less than 20 %. The biodegradation percentage of the reference compound, sodium acetate, at day 14 was 83. Finally, the validity of the test is shown by oxygen concentrations > 0.5 mg/L in all bottles during the test period.
The test substance should be classified as not biodegradable. Lack of biodegradation does not mean that the test item in mineral oil is recalcitrant in nature. The stringency of the test procedures could account for the recalcitrance in the Closed Bottle test.