Registration Dossier
Registration Dossier
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EC number: 461-670-1 | CAS number: -
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:
- 2005
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 005
- Report date:
- 2005
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Version / remarks:
- and EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
Reference
- Name:
- Unnamed
- Type:
- Constituent
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, adapted
- Details on inoculum:
- - Source of inoculum/activated sludge: collected from a water treatment plant containing effluent from a predominantly domestic origin,
from the water treatment plant of Evreux, France
- Preparation of inoculum for exposure: The inoculum was prepared by initially decanting and sieving sewage sludge. The sludge was then centri-
fuged for 5 minutes, the supernatant was rejected and the pellet was redispersed in the mineral medium.
- Concentration of sludge: 20 mg / l of suspended solids (dry weight) in 3 lires of suspension
- Water filtered: yes - Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 10 mg/L
- Based on:
- other: TOC
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- TOC removal
- Details on study design:
- Measurements of CO2 on days 1, 4, 6, 8, 11, 14, 18, 22, 25, 29.
Reference substance
- Reference substance:
- acetic acid, sodium salt
Results and discussion
- Preliminary study:
- None.
% Degradation
- Parameter:
- % degradation (TOC removal)
- Value:
- 77
- Sampling time:
- 28 d
BOD5 / COD results
- Results with reference substance:
- 77 % after 14 days.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- not readily biodegradable
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