Registration Dossier
Registration Dossier
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EC number: 473-780-7 | 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:
- From 15 August to 13 September 2006
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Guideline study, GLP compliant; no restrictions, fully adequate for assessment
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 006
- Report date:
- 2006
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 13.9 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- CO2 evolution
Reference substance
- Reference substance:
- benzoic acid, sodium salt
Results and discussion
- Preliminary study:
- None
- Test performance:
- No unusual observations were noted.
% Degradation
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 6
- Sampling time:
- 28 d
- Details on results:
- For details, see Table 11.
BOD5 / COD results
- Results with reference substance:
- Table 10 - Results reference substance
Day % Degradation Sodium Benzoate
0 0
1 14
2 18
3 29
6 39
8 60
10 72
14 86
16 95
20 89
22 106
24 115
27 115
28 114
Any other information on results incl. tables
Table 11 - Results biodegradation test
Day |
% Degradation Test Material |
0 |
0 |
1 |
0 |
2 |
0 |
3 |
0 |
6 |
0 |
8 |
0 |
10 |
0 |
14 |
0 |
16 |
0 |
20 |
0 |
22 |
1 |
24 |
3 |
27 |
6 |
28 |
6 |
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- other: not readily biodegradable
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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