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EC number: 204-303-0 | CAS number: 119-17-5
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: inherent biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1990
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Study followed Guideline, relevant data are given
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 990
- Report date:
- 1990
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)
- Deviations:
- not specified
- GLP compliance:
- no
Test material
- Reference substance name:
- m-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonic acid
- EC Number:
- 204-303-0
- EC Name:
- m-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonic acid
- Cas Number:
- 119-17-5
- Molecular formula:
- C10H10N2O4S
- IUPAC Name:
- 3-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzene-1-sulfonic acid
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- other: sludge, mixed from industrial and non-industrial STP 30:70%
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 200 mg/L
- Based on:
- DOC
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- DOC removal
Results and discussion
% Degradationopen allclose all
- Parameter:
- % degradation (DOC removal)
- Value:
- 0
- Sampling time:
- 3 h
- Parameter:
- % degradation (DOC removal)
- Value:
- 15
- Sampling time:
- 28 d
BOD5 / COD results
- Results with reference substance:
- DEG: 98% removal after 10 days
Applicant's summary and conclusion
- Validity criteria fulfilled:
- not specified
- Interpretation of results:
- not inherently biodegradable
- Conclusions:
- The test substance is not inherently biodegradable
- Executive summary:
The inherent biodegradability of the test item was determined with the Zahn-Wellens-Test (OECD 302B). The total elimination and degradation after 28 days was 15% determined as DOC. No elimination was found after 3 hours.
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