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EC number: 210-412-4 | CAS number: 615-16-7
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1992-12-08 to 1993-01-05
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: According to guideline OECD 301E but Tox-control is missing. Toxicity to microorganisms according to guideline OECD 209: EC50 > 1000 mg/l
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 993
- Report date:
- 1993
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 E (Ready biodegradability: Modified OECD Screening Test)
- Deviations:
- no
- GLP compliance:
- yes
Test material
- Reference substance name:
- 2-hydroxybenzimidazole
- EC Number:
- 210-412-4
- EC Name:
- 2-hydroxybenzimidazole
- Cas Number:
- 615-16-7
- Molecular formula:
- C7H6N2O
- IUPAC Name:
- 2-hydroxybenzimidazole
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, predominantly domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): local STP Frankfurt-Sindlingen
- Pretreatment: filtered (folded filter)
- Concentration of sludge: 0.5 ml/l - Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 35.4 mg/L
- Based on:
- DOC
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- DOC removal
Reference substance
- Reference substance:
- benzoic acid, sodium salt
Results and discussion
% Degradation
- Parameter:
- % degradation (DOC removal)
- Value:
- 18.1
- Sampling time:
- 28 d
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- under test conditions no biodegradation observed
- Executive summary:
18.1 % biodegradation under test conditions: not readily biodegradable
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