Registration Dossier
Registration Dossier
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EC number: 270-931-7 | CAS number: 68510-93-0
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 19 Mar 1990
- Reliability:
- 4 (not assignable)
Data source
Reference
- Reference Type:
- other company data
- Title:
- Unnamed
- Year:
- 1 990
- Report date:
- 1990
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- Qualifier:
- according to guideline
- Guideline:
- other: Richtlinie 84/449/EWG (Teil C), EG Amtsblatt L 291/188
- Qualifier:
- according to guideline
- Guideline:
- other: DIN 38 409 Teil 3
- GLP compliance:
- not specified
Test material
- Reference substance name:
- 1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, ester with phenyl(2,3,4-trihydroxyphenyl)methanone
- EC Number:
- 270-931-7
- EC Name:
- 1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, ester with phenyl(2,3,4-trihydroxyphenyl)methanone
- Cas Number:
- 68510-93-0
- Molecular formula:
- all potential esters of C10HH5O3N2SCl and C13H10O4
- IUPAC Name:
- 3-benzoyl-2-hydroxy-6-({[5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalen-1-yl]sulfonyl}oxy)phenyl 5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalene-1-sulfonate; 4-benzoyl-2,3-bis({[5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalen-1-yl]sulfonyl}oxy)phenyl 5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalene-1-sulfonate; 4-benzoyl-2,3-dihydroxyphenyl 5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalene-1-sulfonate
- Test material form:
- solid
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge: Sewage treatment plant Sindlingen, Frankfurt am Main, Germany (domestic)
- Preparation of inoculum for exposure: The pH of the activated sludge was adjusted from pH 5.8 to 7.6 using 1 M NaOH and then stirred for 24 h at 20 °C. The pH after stirring was 7.0.
- Initial cell/biomass concentration: 1 drop per Liter test solution. - Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 1 716 other: mg/g
- Based on:
- COD
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- TEST CONDITIONS
- Test temperature: 20 °C
- pH: 7.0 (activated sludge)
- pH adjusted: The pH of the activated sludge was adjusted with 1 M NaOH.
TEST SYSTEM
- Test performed in open system: No
SAMPLING
- Sampling frequency: Oxygen measurements were performed after 7, 14, 21, and 28 d
Results and discussion
% Degradation
- Parameter:
- % degradation (O2 consumption)
- Value:
- ca. 39
- Sampling time:
- 28 d
Applicant's summary and conclusion
- Validity criteria fulfilled:
- not specified
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- Substance is not readily biodegradable.
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