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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Bluequat bromide (CAS # 502453-61-4) is not readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

An OECD 301B Ready Test was conducted on Bluequat bromide (CAS # 502453 -61 -4).The concentration of the test substance was20mg/Land the inoculum concentration was 10(7) – 10(8) CFU/L. The test treatments and blanks were conducted in duplicate with a reference substance. The test material did not meet the requirements for passing the Ready test. After 28 days, the % theoretical CO2 evolved was 13% (replicate 1) and 22% (replicate 2). Bluequat bromide was not readily biodegradable.

The reference material, sodium benzoate reached 10% biodegradation after 2days and > 60% after day 6. It met the validity criteria established in the guideline for a reference material.

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