Registration Dossier
Registration Dossier
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EC number: 219-518-5 | CAS number: 2452-01-9
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Study period:
- 2003
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Guideline study with abridged report
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 003
- Report date:
- 2003
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- GLP compliance:
- no
Test material
- Reference substance name:
- Zinc bis[12-hydroxyoctadecanoate]
- EC Number:
- 252-669-5
- EC Name:
- Zinc bis[12-hydroxyoctadecanoate]
- Cas Number:
- 35674-68-1
- IUPAC Name:
- zinc bis(12-hydroxyoctadecanoate)
- Test material form:
- other: solid
Constituent 1
Study design
- Details on inoculum:
- activated sludge from the aeration pool of the domestic sewage treatment plant in Neustadt, Germany sampled on 2001-02-06
- Duration of test (contact time):
- 29 d
Results and discussion
% Degradationopen allclose all
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 14.5
- Sampling time:
- 4 d
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 53.5
- Sampling time:
- 13 d
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 72
- Sampling time:
- 29 d
- Details on results:
- In a OECD 301B test, 72% of Zinc-12-Hydroxystearate degraded biologically in 29 days (71% in 28d) as measured by carbon dioxide emission. Zinc-12-Hydroxystearate is readily biodegradable as the 60% level was passed within 28 days but failed the 10 day window criteria.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable, but failing 10-day window
- Conclusions:
- Altogether, 71% of zinc-12-hydroxystearate was biodegraded after 28 days as determined in the test according to OECD 301B. This value was calculated from emitted carbon dioxide. Zinc-12-Hydroxystearate is readily biodegradable as the 60% level was passed within 28 days but failed the 10 day window criteria.
- Executive summary:
Altogether, 71% of zinc-12-hydroxystearate was biodegraded after 28 days as determined in the OECD 301B test with 14.5 % after 4 days and 53.5% after 13 days. Zinc-12-hydroxystearate is readily biodegradable as the 60% level was passed within 28 days but failed the 10 day window criteria.
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