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Environmental fate & pathways

Biodegradation in water: screening tests

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Link to relevant study record(s)

Description of key information

An OECD 301D (Ready Biodegradability: Closed Bottle Test) study was conducted using the test substance Betadet SHR. Results demonstrate that the test substance can be considered to be readily biodegradable, given that the substance attained 94% degradation after 28 days whilst meeting the 10-day window (showing 25% degradation on day 6 and 77% degradation on day 12 of the study).  


The reference substance, sodium benzoate, attained 93% degradation after 28 days, thereby confirming the suitability of the test method and culture conditions. Furthermore, the toxicity control, attained 87% degradation after 28 days, confirming that Betadet SHR was not toxic to the sewage treatment microorganisms used in the study. As such, the study is considered to be valid.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

[Type of water: freshwater]