Registration Dossier
Registration Dossier
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EC number: 255-419-3 | CAS number: 41506-62-1
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: inherent biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1989-1990
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: according to OECD 302B (Zahn- Wellens test) but only results reported
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 990
- Report date:
- 1990
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.9 (Biodegradation: Zahn-Wellens Test)
- Qualifier:
- according to guideline
- Guideline:
- other: german DIN 38412
- GLP compliance:
- not specified
Test material
- Reference substance name:
- N-(4-acetylaminophenyl)-3-hydroxynaphthalene-2-carboxamide
- EC Number:
- 255-419-3
- EC Name:
- N-(4-acetylaminophenyl)-3-hydroxynaphthalene-2-carboxamide
- Cas Number:
- 41506-62-1
- Molecular formula:
- C19H16N2O3
- IUPAC Name:
- N-(4-acetamidophenyl)-3-hydroxy-2-naphthamide
Constituent 1
Study design
- Inoculum or test system:
- activated sludge, industrial (adaptation not specified)
- Details on inoculum:
- activated sludge from industrial source; no further detailed information about inoculum
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 114 other: mg C/L
- Based on:
- DOC
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- DOC removal
- Details on study design:
- Preparation of stock solution:
test substance 5 g/L
pH adjusted to 7.0
batch agitated for 24h at 21°C
pH adjusted to 7.0
DOC determined value of stock solution: 150 mg C/L (calculated theoretical value.: 712.8 mg C/g)
COD determined value of stock solution: 418 mg O2/L (calculated theoretical value.: 1998 mg O2/g)
Reference substance
- Reference substance:
- not specified
Results and discussion
% Degradationopen allclose all
- Parameter:
- % degradation (DOC removal)
- Value:
- 0
- Sampling time:
- 3 h
- Remarks on result:
- other: determined elimination (biodegradation + adsorption) of 75% fully caused by adsorption --> biodegradation = 0%
- Parameter:
- % degradation (DOC removal)
- Value:
- 0
- Sampling time:
- 5 d
- Remarks on result:
- other: determined elimination (biodegradation + adsorption) of 75% fully caused by adsorption --> biodegradation = 0%
- Parameter:
- % degradation (DOC removal)
- Value:
- 0
- Sampling time:
- 12 d
- Remarks on result:
- other: determined elimination (biodegradation + adsorption) of 63% fully caused by adsorption --> biodegradation = 0%
- Parameter:
- % degradation (DOC removal)
- Value:
- 0
- Sampling time:
- 21 d
- Remarks on result:
- other: determined elimination (biodegradation + adsorption) of 78% fully caused by adsorption --> biodegradation = 0%
- Parameter:
- % degradation (DOC removal)
- Value:
- 0
- Sampling time:
- 28 d
- Remarks on result:
- other: determined elimination (biodegradation + adsorption) of 83% fully caused by adsorption --> biodegradation = 0%
Applicant's summary and conclusion
- Validity criteria fulfilled:
- not specified
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- The tested substance is not biodegradable.
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