Registration Dossier
Registration Dossier
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EC number: 448-020-2 | CAS number: -
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:
- 21.6.2001 - 2.7.2001
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 001
- Report date:
- 2001
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Test Guideline 301 B and EC Directive 92/69/EEC,C.4-C.
- GLP compliance:
- yes
Test material
Reference
- Name:
- Unnamed
- Type:
- Constituent
- Details on test material:
- Dusantox L Batch No.: Dusantox L 7/2000
Date of manufacture: 12/2000
Stability: > 1 year at room temperature
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, non-adapted
- Details on inoculum:
- from Marl-Ost municipal sewage treatment plant
- Duration of test (contact time):
- <= 29 d
Initial test substance concentration
- Initial conc.:
- >= 10 - <= 20 mg/L
- Based on:
- DOC
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- CO2 evolution
Reference substance
- Reference substance:
- benzoic acid, sodium salt
- Remarks:
- Sodium benzoate, Microselect 99,5 % Fluka
Results and discussion
% Degradation
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 46
- Sampling time:
- 28 d
- Details on results:
- Points of degradation plot (test substance):
1 % degradation after 2 d
2 % degradation after 5 d
7 % degradation after 9 d
25 % degradation after 14 d
37 % degradation after 19 d
44 % degradation after 23 d
45 % degradation after 28 d
BOD5 / COD results
- Results with reference substance:
- Points of degradation plot (reference substance):
43 % degradation after 2 d
73 % degradation after 5 d
78 % degradation after 9 d
81 % degradation after 14 d
84 % degradation after 19 d
93 % degradation after 23 d
93 % degradation after 28 d
Applicant's summary and conclusion
- Interpretation of results:
- other: not readily biodegradable
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