Registration Dossier
Registration Dossier
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EC number: 266-164-2 | CAS number: 66108-95-0
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- March 1994
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: The study and data are well documented and scientifically acceptable.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 994
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- ISO DIS 9408 (Ultimate Aerobic Biodegradability - Method by Determining the Oxygen Demand in a Closed Respirometer)
- Version / remarks:
- and OECD 301F
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Iohexol
- EC Number:
- 266-164-2
- EC Name:
- Iohexol
- Cas Number:
- 66108-95-0
- Molecular formula:
- C19H26I3N3O9
- IUPAC Name:
- 5-[acetyl(2,3-dihydroxypropyl)amino]-N,N'-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, adapted
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 100 mg/L
Results and discussion
% Degradation
- Parameter:
- % degradation (DOC removal)
- Value:
- 0
- Sampling time:
- 28 d
Applicant's summary and conclusion
- Interpretation of results:
- not inherently biodegradable
- Conclusions:
- The result classify as "not readily biodegradable" according to the OECD criteria, which require a DOC removal of 70% in 28 days for classification as "readily biodegradable"
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