Registration Dossier
Registration Dossier
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EC number: 616-586-1 | CAS number: 78068-85-6
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- other information
- Study period:
- 2001-06-07 to 2001-07-06
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 001
- Report date:
- 2001
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- 2-chloro-1-fluoro-4-(trifluoromethyl)benzene
- EC Number:
- 616-586-1
- Cas Number:
- 78068-85-6
- Molecular formula:
- C7H3ClF4
- IUPAC Name:
- 2-chloro-1-fluoro-4-(trifluoromethyl)benzene
- Reference substance name:
- 1-Chloro-2-fluoro-4-(trifluoromethyl)benzene
- Cas Number:
- 32137-20-5
- Molecular formula:
- C7H3ClF4
- IUPAC Name:
- 1-Chloro-2-fluoro-4-(trifluoromethyl)benzene
- Test material form:
- liquid
Constituent 1
impurity 1
- Specific details on test material used for the study:
- Purity: 89.5 % [a/a]
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- Source: Municipal sewage treatment plant, D-31137 Hildesheim
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 30 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- CO2 evolution
Reference substance
- Reference substance:
- acetic acid, sodium salt
Results and discussion
% Degradation
- Parameter:
- % degradation (CO2 evolution)
- Value:
- >= 0 - <= 3
- Sampling time:
- 28 d
BOD5 / COD results
- Results with reference substance:
- The functional control reached a degradation rate of 69 % on day 14 and a maximum of 75 % on day 21. The quality criterion degradation≥60 % after 14 d was fulfilled.
In the toxicity control containing both test and reference item a biodegradation rate of 16 % occurred within 14 days.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- The test item must be regarded as toxic in the tested concentration and not readily biodegradable.
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