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EC number: 266-380-7 | CAS number: 66492-51-1
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:
- other: GLP guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
- Report date:
- 2010
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:
- SR531
- IUPAC Name:
- SR531
- Details on test material:
- Sponsor's identification: SR531
Description: pale yellow liquid
Batch number: KTE0864
Date received: 16 June 2010
Expiry date: 16 December 2010
Storage conditions: room temperature in the dark
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, predominantly domestic, non-adapted
- Details on inoculum:
- A mixed population of activated sewage sludge micro-organisms was obtained on
5 July 2010 from the aeration stage of the Severn Trent Water Pie sewage treatment
plant at Loughborough, Leicestershire, UK, which treats predominantly domestic
sewage. - Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 10 mg/L
- Based on:
- other: carbon
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:
- 28
- Sampling time:
- 28 d
BOD5 / COD results
- Results with reference substance:
- Sodium benzoate attained 72% degradation after 14 days 84% degradation after
28 days thereby confirming the suitability of the inoculum and test conditions.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- inherently biodegradable
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