Registration Dossier
Registration Dossier
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EC number: 403-470-9 | CAS number: - CYANEX (R) EXTRACTANT; CYANEX 923 EXTRACTANT
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:
- 10/19 to 11/16/1989
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 989
- Report date:
- 1989
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- GLP compliance:
- yes
Test material
- Reference substance name:
- A mixture of: hexyldioctylphosphineoxide; dihexyloctylphosphineoxide; trioctylphosphineoxide
- IUPAC Name:
- A mixture of: hexyldioctylphosphineoxide; dihexyloctylphosphineoxide; trioctylphosphineoxide
- Test material form:
- liquid: viscous
Constituent 1
Study design
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Duration of test (contact time):
- 28 d
Initial test substance concentrationopen allclose all
- Initial conc.:
- 1 mg/L
- Based on:
- DOC
- Initial conc.:
- 2 mg/L
- Based on:
- DOC
- Initial conc.:
- 5 mg/L
- Based on:
- DOC
Reference substance
- Reference substance:
- aniline
Results and discussion
% Degradation
- Parameter:
- % degradation (O2 consumption)
- Value:
- 96.2
- Sampling time:
- 28 d
Any other information on results incl. tables
The submitted sample was found to degrade 96.2% after 28 days.
This level of biodegradability was achieved in the 2 mg/L target test concentration. 100% degradation was achieved in the confirming 1 mg/L concentration.
The reference compound, Aniline, degraded 100% after 28 days, thereby rendering the results valid.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- The test substance is considered readiliy biodegradable with 96% degradation after 28 days using the Closed Bottle test.
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