Registration Dossier
Registration Dossier
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EC number: 280-744-2 | CAS number: 83763-57-9
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:
- 1995
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 995
- Report date:
- 1995
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)
- Principles of method if other than guideline:
- None
- GLP compliance:
- yes
Test material
- Reference substance name:
- Trisodium 2-[[6-[(4-amino-6-chloro-1,3,5-triazin-2-yl)methylamino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]naphthalene-1,5-disulphonate
- EC Number:
- 274-700-1
- EC Name:
- Trisodium 2-[[6-[(4-amino-6-chloro-1,3,5-triazin-2-yl)methylamino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]naphthalene-1,5-disulphonate
- Cas Number:
- 70616-89-6
- Molecular formula:
- C24H18ClN7O10S3.3Na
- IUPAC Name:
- trisodium 2-({6-[(4-amino-6-chloro-1,3,5-triazin-2-yl)(methyl)amino]-1-hydroxy-3-sulfonato-2-naphthyl}diazenyl)naphthalene-1,5-disulfonate
- Test material form:
- solid: particulate/powder
Constituent 1
- Specific details on test material used for the study:
- None
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Details on inoculum:
- Activated sludge of a communal sewage treatment plant Ara Reinach collected on 01.11.94
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 150 mg/L
- Based on:
- DOC
- Details on study design:
- Experimental conditionsWater / Nutrient: according to the specifications of the OECD guidelineTemperature: 20 - 25 °C (room temperature)Test duration: 28 daysLighting: indirect daylightEstimation Technique: TOC/DOC Analyzer 500
Reference substance
- Reference substance:
- diethylene glycol
Results and discussion
- Preliminary study:
- None
- Test performance:
- None
% Degradation
- Key result
- Parameter:
- % degradation (DOC removal)
- Value:
- 4
- Sampling time:
- 28 d
- Remarks on result:
- other: Standard deviation not available
- Details on results:
- None
BOD5 / COD results
- Results with reference substance:
- The biodegradation of the reference substance after 8 days was: 98 %
Any other information on results incl. tables
None
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- Biodegradation of the test substance after 28 days was 4 %.
- Executive summary:
A key study was performed to determine the percent biodegradation of FAT 40170. An inherent biodegradability of FAT 40170 was determined in a modified Zahn-Wellens - Test according to the OECD Guideline for Testing of Chemicals, No. 302B, 1992. The test substance was tested in a concentration of 150 mg/l. The reference substance (Diethylene glycol) was tested in a concentration of 150 mg/l. Based on the results of the study, biodegradation of the test substance after 28 days was 4 %.
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