Registration Dossier
Registration Dossier
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EC number: 204-482-5 | CAS number: 121-57-3
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Published study sufficiently documented
Data source
Reference
- Reference Type:
- publication
- Title:
- Fate and biodegradability of sulfonated aromatic amines
- Author:
- N. Tan
- Year:
- 2 005
- Bibliographic source:
- Biodegradation (2005) 16: 527–537
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
Test material
- Reference substance name:
- 4-ABS
- IUPAC Name:
- 4-ABS
Constituent 1
Study design
- Oxygen conditions:
- aerobic
Results and discussion
Applicant's summary and conclusion
- Executive summary:
The test substance was tested for its aerobic and anaerobic biodegradability and toxicity potential in a variety of environmental inocula. The observed degradation of the test substance occurred only under aerobic conditions with inocula sources that were historically polluted with sulfonated aromatic amines. Bioreactor experiments, with non-sterile synthetic wastewater, confirmed the results from the aerobic batch degradation experiments. The test substance was degraded in long-term continuous experiment by a bioaugmented enrichment culture.
Evidence for extensive mineralization of the test substance was based on oxygen uptake and carbon dioxide production during the batch experiments and the high levels of chemical oxygen demand (COD) removal in the bioreactor. Furthermore, mineralization of the sulfonate group was demonstrated by high recovery of sulfate. The test substance did not show any toxic effects on the aerobic and anaerobic bacterial populations tested.
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