Registration Dossier
Registration Dossier
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EC number: 939-726-6 | CAS number: -
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Non GLP, guideline study, published in peer reviewed literature, limitations in reporting but otherwise acceptable for assessment.
Data source
Reference
- Reference Type:
- publication
- Title:
- Brine shrimp bioassay and seawater BOD of petrochemicals
- Author:
- Price, Waggy and Conway
- Year:
- 1 974
- Bibliographic source:
- Water Pollution Control Federation 46(1), 63-77
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: APHA method n° 219 (1971)
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Toluene
- EC Number:
- 203-625-9
- EC Name:
- Toluene
- Cas Number:
- 108-88-3
- Molecular formula:
- C7H8
- IUPAC Name:
- toluene
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, domestic, adapted
- Details on inoculum:
- 3ml settled domestic waste water, filtered through glass wool. Adapted.
- Duration of test (contact time):
- 20 d
Initial test substance concentrationopen allclose all
- Initial conc.:
- 3 mg/L
- Based on:
- test mat.
- Initial conc.:
- 7 mg/L
- Based on:
- test mat.
- Initial conc.:
- 10 mg/L
- Based on:
- test mat.
- Initial conc.:
- > 3 - < 30 mg/L
- Based on:
- other: oxygen demand
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- Tested in duplicate. When the dissolved oxygen dropped below 4mg/l the contents were reaerated. The bottles were opened for sampling about 5 times during the 20 day test.
Results and discussion
% Degradationopen allclose all
- Parameter:
- other: BOD/THOD
- Value:
- 73
- Sampling time:
- 5 d
- Parameter:
- other: BOD/THOD
- Value:
- 74
- Sampling time:
- 10 d
- Parameter:
- other: BOD/THOD
- Value:
- 80
- Sampling time:
- 15 d
- Parameter:
- other: BOD/THOD
- Value:
- 86
- Sampling time:
- 20 d
Applicant's summary and conclusion
- Interpretation of results:
- readily biodegradable
- Conclusions:
- Toluene biodegrades rapidly under the conditions of this test.
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