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EC number: 235-985-8 | CAS number: 13080-86-9
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:
- 23 Feb - 14 Mar 1986
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- documentation insufficient for assessment
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 986
- Report date:
- 1986
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: Test Methode relating to New Chemical Substances (Kanpogyo N° 5, Yakuhatsu N° 616, 49 Kikyoku N° 392)
- GLP compliance:
- no
Test material
- Reference substance name:
- 4,4'-[isopropylidenebis(4,1-phenyleneoxy)]dianiline
- EC Number:
- 235-985-8
- EC Name:
- 4,4'-[isopropylidenebis(4,1-phenyleneoxy)]dianiline
- Cas Number:
- 13080-86-9
- Molecular formula:
- C27H26N2O2
- IUPAC Name:
- 4,4'-[isopropylidenebis(4,1-phenyleneoxy)]dianiline
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Details on inoculum:
- - Source of inoculum/activated sludge: Conventional activated sludge purchased from Chemical Safety Center, Chemicals Inspection & Testing Inst., Japan on February 20, 1986
- Storage conditions: Conventional activated sludge was cultured in the culture system in the draft under the conditions of temperature 25 ± 2°C, pH 7.0 ± 1.0, and ventilation volume ≥5 ppm.
- Storage length: Cultured for 4 days
- Concentration of sludge: The activated sludge concentration was measured using a sludge densitometer (CENTRAL KAGAKU CORP: ML-52, SOP /INS /4.28). - Duration of test (contact time):
- 14 d
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- TEST SYSTEM
- Culturing apparatus: Closed system oxygen consumption measuring apparatus manufactured by Ohkura Electric Co., Ltd.
- Measuring equipment: Closed system oxygen consumption measuring apparatus manufactured by Ohkura Electric Co., Ltd. Coulometer: Identification No.1 (SOP/INS/4.5)
Results and discussion
% Degradationopen allclose all
- Parameter:
- % degradation (O2 consumption)
- Value:
- 8.3
- Sampling time:
- 14 d
- Remarks on result:
- other: Mean value; BOD degradation
- Parameter:
- % degradation (O2 consumption)
- Value:
- 10.5
- Sampling time:
- 14 d
- Remarks on result:
- other: Mean value; direct determination based on HPLC
BOD5 / COD results
- Results with reference substance:
- Because the degradability of aniline was 66.0% after 7 days, good degradability was confirmed.
Applicant's summary and conclusion
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- About 90% of the test item is not completely mineralized, and the test item is a persistent chemical substance under the conditions specified in the Law Concerning the Examination and Regulation of Manufacture, etc. of Chemical Substances.
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