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Registration Dossier
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EC number: 203-916-0 | CAS number: 111-86-4
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: inherent biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- other information
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Guideline study.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 988
- Report date:
- 1994
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)
- Deviations:
- yes
- Principles of method if other than guideline:
- Ratio DOC / activated sludge dry weight at about 1 / 5.
20% difference in the amount of inoculum. - GLP compliance:
- not specified
Test material
- Reference substance name:
- Octylamine
- EC Number:
- 203-916-0
- EC Name:
- Octylamine
- Cas Number:
- 111-86-4
- Molecular formula:
- C8H19N
- IUPAC Name:
- octan-1-amine
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, non-adapted
- Details on inoculum:
- origin: mixed inoculum of sewage treatment plants and Hoechst and Kelsterbach, 1: 2
Type of inoculum: Centrifuged sediment from activated sludge was washed, centrifuged again, and resuspended.
Use centrifuged wet sludge: 12 g/l
accordingly: 1000 mg / l dry weight
pretreatment: none - Duration of test (contact time):
- 31 d
Initial test substance concentration
- Initial conc.:
- 200 mg/L
- Based on:
- DOC
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- DOC removal
Reference substance
- Reference substance:
- diethylene glycol
- Remarks:
- DOC=200mg/l; Biodegradation (14d)>70%
Results and discussion
% Degradationopen allclose all
- Parameter:
- % degradation (DOC removal)
- Value:
- 14.7
- Sampling time:
- 22 d
- Parameter:
- % degradation (DOC removal)
- Value:
- 65.7
- Sampling time:
- 26 d
- Parameter:
- % degradation (DOC removal)
- Value:
- 81.7
- Sampling time:
- 31 d
- Details on results:
- adaption phase: 21d
<10% biodegradation within 20d
>80% biodegradation within 28d
Adsorption: 7.5% all biodegradation values are corrected.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- inherently biodegradable
- Conclusions:
- Octylamine was found to be inherently biodegradable in a OECD302B test.
- Executive summary:
Octylamine was found to be inherently biodegradable in a OECD302B test.
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