Registration Dossier
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EC number: 406-176-9 | CAS number: 79072-96-1 NC-4
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1991
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study without detailed documentation
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Deviations:
- not specified
- GLP compliance:
- not specified
- Specific details on test material used for the study:
- Not available.
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- not specified
- Duration of test (contact time):
- 28 d
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Reference substance:
- benzoic acid, sodium salt
- Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- >= 6 - <= 17
- Sampling time:
- 28 d
- Remarks on result:
- other: Not readily biodegradable
- Results with reference substance:
- Na-Benzoate attained 74% degradation after 6 days.
- Validity criteria fulfilled:
- not specified
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- The test material achieved 6-17% degradation after 28 days and is not considered to be readily biodegradable. After 44 days 5-17% degradation was achieved.
Reference
Test Substance |
Reference Substance |
||
Day |
% degradation |
Day |
% degradation |
5 |
0 |
6 |
74 |
12 |
5, 0 |
|
|
15 |
9, 0 |
|
|
20 |
9, 0 |
|
|
23 |
9, 5 |
|
|
26 |
10, 5 |
|
|
44 |
17, 5 |
|
|
Description of key information
The test material achieved 6-17% degradation after 28 days and is not considered to be readily biodegradable (under OECD 301B). After 44 days 5-17% degradation was achieved.
The Sodium-Benzoate reference substance attained 74% degradation after 6 days.
Key value for chemical safety assessment
- Biodegradation in water:
- not biodegradable
- Type of water:
- freshwater
Additional information
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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