Registration Dossier
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EC number: 608-711-3 | CAS number: 32167-31-0
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:
- 2001-01-25 to 2001-03-02 (experimental phase)
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 A (Ready Biodegradability: DOC Die Away Test)
- GLP compliance:
- yes (incl. QA statement)
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge: Activated sludge from Iaboratory wastewater plants treating municipal sewage. Concentration of dry substance 30 mg/L
- Concentration of sludge: 30 mg/L dry substance - Duration of test (contact time):
- 35 d
- Initial conc.:
- 36 mg/L
- Based on:
- test mat.
- Initial conc.:
- 20 mg/L
- Based on:
- DOC
- Parameter followed for biodegradation estimation:
- DOC removal
- Reference substance:
- aniline
- Key result
- Parameter:
- % degradation (DOC removal)
- Value:
- 60 - 70
- Sampling time:
- 28 d
- Parameter:
- % degradation (DOC removal)
- Value:
- 70 - 80
- Sampling time:
- 35 d
- Results with reference substance:
- - Degradation degree of the reference substance after 14 days (% DOC) : 90-100
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- other: biodegradable
Reference
Elimination of the test substance by adsorption (% DOC) : < 10 after 5 days
Description of key information
Not readily biodegradable according to OECD criteria. Biodegradable
Key value for chemical safety assessment
- Biodegradation in water:
- inherently biodegradable
- Type of water:
- freshwater
Additional information
The ready biodegradability of the test substance was investigated in a GLP guideline study according to OECD 301A (BASF 2002). After the regular test duration of 28 days the substance was degraded to a degree of 60 - 70% based on DOC removal. After 35 days, the biodegradation degree was determined to be 70 to 80%.Based on this result, the substance can be termed biodegradable but not readily biodegradable according to OECD criteria.
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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