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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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
GLP compliance:
yes
Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge (adaptation not specified)
Duration of test (contact time):
<= 28 d
Initial conc.:
ca. 100 mg/L
Based on:
ThOD
Remarks:
Test item
Initial conc.:
ca. 30 mg/L
Based on:
ThOD
Remarks:
SS
Parameter followed for biodegradation estimation:
O2 consumption
Details on study design:
The theoretical oxygen demand was calculated based on the structural formula and the molecular weight as provide by sponsor.
Reference substance:
other: sodium benzoate
Key result
Parameter:
% degradation (O2 consumption)
Value:
ca. 17.5
Sampling time:
28 d
Results with reference substance:
The percentage microbial degradation of the reference item, sodium benzoate, observed by BOD meter was 71.2% after 7 days and 82.8% after 14 days.
Validity criteria fulfilled:
yes
Interpretation of results:
not readily biodegradable

Description of key information

Key value for chemical safety assessment

Biodegradation in water:
inherently biodegradable
Type of water:
freshwater

Additional information