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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Biodegradation in water: screening tests

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Administrative data

Link to relevant study record(s)

Description of key information

OECD Guideline 301 D, GLP, key study, validity 1:
85% biodegradation after 28 days, within the 14-day window .
Readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

To assess the biodegradation potentiel of the registered substance, one key study is available.

In this valid study, the ready biodegradability of the registered substance has been determined by the Closed Bottle Test according to the OECD Guideline 301D with GLP statement. The test substance was exposed to river water at a concentration of 4 mg/L with culture medium in closed bottles in the dark at 22-24 °C for 7, 14, 21 and 28 days. The degradation of the test material was assessed by the measurement of oxygen consumption. 

The test substance was biodegraded 85% at day 28. Over 60% biodegradation was achieved in a period of approximately 8 days immediately following the attainment of 10% biodegradation. The test substance therefore fulfilled the 14-day time window criterion for ready biodegradable substances (14-day time window can be applied to the Closed Bottle test where measurements are limited to prevent the test becoming too unwieldy). In conclusion, the registered substance is classified as readily biodegradable. In addition, the test substance did not cause a reduction in the endogenous respiration. The registered substance is therefore considered to be non-inhibitory to the inoculum.