Registration Dossier
Registration Dossier
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EC number: 849-175-2 | CAS number: 51762-56-2
Biodegradation in water: screening tests
Administrative data
- 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
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 020
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- 9-oxo-9H-thioxanthene-4-carboxylic acid
- EC Number:
- 849-175-2
- Cas Number:
- 51762-56-2
- Molecular formula:
- C14H8O3S
- IUPAC Name:
- 9-oxo-9H-thioxanthene-4-carboxylic acid
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Duration of test (contact time):
- 28 d
Results and discussion
% Degradation
- Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 60
- Sampling time:
- 28 d
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- • The test item 9-oxo-9H-thioxanthene-4-carboxylic acid is considered as “not readily biodegradable“.
• No biodegradation was observed after 28 days.
• The 10-day-window was not detected.
• Degradation missed 60 % within 28 days, too. Therefore, the test item is considered as “not ultimately biodegradable within 28 days”, as well.
• Abiotic degradation was not observed.
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