Registration Dossier
Registration Dossier
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EC number: 215-516-3 | CAS number: 1328-18-3 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 59805.
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: inherent biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 1978
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- documentation insufficient for assessment
- Remarks:
- No information given on negative control and validity criteria.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 978
- Report date:
- 1977
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: Modified OECD Confirmatory Tests
- Version / remarks:
- The test was conducted according to SOP A-12 (1974-09-01).
- GLP compliance:
- no
Test material
- Reference substance name:
- 16,17-dimethoxyviolanthrene-5,10-dione
- EC Number:
- 204-896-6
- EC Name:
- 16,17-dimethoxyviolanthrene-5,10-dione
- Cas Number:
- 128-58-5
- Molecular formula:
- C36H20O4
- IUPAC Name:
- 16,17-dimethoxyanthra[9,1,2-cde]benzo[rst]pentaphene-5,10-dione
- Test material form:
- solid: particulate/powder
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, industrial (adaptation not specified)
- Duration of test (contact time):
- 21 d
Initial test substance concentrationopen allclose all
- Initial conc.:
- 20 mg/L
- Based on:
- TOC
- Initial conc.:
- 57.9 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- TOC removal
- Details on study design:
- TEST CONDITIONS
- Composition of medium: TOC content of medium: 110 mg/L
TEST SYSTEM
- Number of culture flasks/concentration: 1
CONTROL AND BLANK SYSTEM
- Inoculum blank: yes
Results and discussion
% Degradation
- Key result
- Parameter:
- % degradation (TOC removal)
- Value:
- 84
- St. dev.:
- 3
- Sampling time:
- 21 d
BOD5 / COD results
BOD5 / CODopen allclose all
- Parameter:
- BOD5
- Value:
- 35 mg O2/g test mat.
- Remarks on result:
- other: Test item conc. 100 mg/L
- Parameter:
- COD
- Value:
- 1 759 mg O2/g test mat.
- Remarks on result:
- other: Test item conc. 5 mg/L
Applicant's summary and conclusion
- Validity criteria fulfilled:
- not specified
- Interpretation of results:
- inherently biodegradable
- Conclusions:
- The substance was found to be inherently biodegradable (84% after 21 d based on TOC removal).
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