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Environmental fate & pathways

Biodegradation in water: screening tests

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Reference
Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2020
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
Version / remarks:
1992
Deviations:
no
GLP compliance:
yes
Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic (adaptation not specified)
Reference substance:
benzoic acid, sodium salt
Key result
Parameter:
% degradation (O2 consumption)
Value:
99.2
Sampling time:
28 d
Validity criteria fulfilled:
yes
Interpretation of results:
readily biodegradable
Conclusions:
The maximum average degradation percentage of the test substance is 99.2% (at plateau, after 28 days). Furthermore, 60% degradation is obtained within the 10-day window even if the samples is an UVCB. Therefore, the substance can be considered as readily biodegradable.

Description of key information

The maximum average degradation percentage of the test substance is 99.2% (at plateau, after 28 days). Furthermore, 60% degradation is obtained within the 10-day window even if the samples is an UVCB. Therefore, the substance can be considered as readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable
Type of water:
freshwater

Additional information