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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

In a CO2 Evolution Test (Modified Sturm Test), according to OECD guideline 301 B and GLP principles, the test substance was assessed for its ready biodegradability. The test substance was tested in duplicate at a target concentration of 21 mg/L (12 mg TOC/L). The exposure period was 28 days and two inoculum blanks, a procedural control and a toxicity control (sodium acetate) were included. The test item was added directly into the test bottles. The test solutions were continuously stirred during the test to ensure optimal contact between the test item and test organisms. CO2 production was measured by titration. The test substance was 3% and 5% biodegraded, in the duplicate bottles measured. The test substance was found not to inhibit microbial activity. Based on the biodegradation of 3-5%, the substance is classified as not readily biodegradable in the Modified Sturm Test. All validity criteria were met, thus the study was considered to be valid and reliable without restriction.

Key value for chemical safety assessment

Biodegradation in water:
not biodegradable
Type of water:
freshwater

Additional information