Registration Dossier
Registration Dossier
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EC number: 425-090-2 | CAS number: 86087-23-2
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:
- 1996
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP Study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 996
- Report date:
- 1996
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Version / remarks:
- Annex V C4
- GLP compliance:
- yes
Test material
- Reference substance name:
- -
- EC Number:
- 425-090-2
- EC Name:
- -
- Cas Number:
- 86087-23-2
- Molecular formula:
- C4 H8 O2
- IUPAC Name:
- (3S)-oxolan-3-ol
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Duration of test (contact time):
- 28 d
Reference substance
- Reference substance:
- other: Sodium benzoate
Results and discussion
% Degradation
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 27
- Sampling time:
- 28 d
- Details on results:
- parameter measured: CO2 evolution
Points of degradation plot (test substance):
0 % degradation after 1 d
0 % degradation after 2 d
0 % degradation after 3 d
0 % degradation after 6 d
0 % degradation after 8 d
0 % degradation after 10 d
0 % degradation after 14 d
0 % degradation after 16 d
2 % degradation after 20 d
4 % degradation after 22 d
8 % degradation after 24 d
20 % degradation after 27 d
27 % degradation after 28 d
BOD5 / COD results
- Results with reference substance:
- Points of degradation plot (reference substance):
6 % degradation after 1 d
18 % degradation after 2 d
45 % degradation after 3 d
73 % degradation after 6 d
73 % degradation after 8 d
79 % degradation after 10 d
94 % degradation after 14 d
93 % degradation after 16 d
93 % degradation after 20 d
94 % degradation after 22 d
95 % degradation after 24 d
96 % degradation after 27 d
97 % degradation after 28 d
Applicant's summary and conclusion
- Interpretation of results:
- other: not readily biodegradable
- Conclusions:
- 1272W94 attained 27% degradation after 28days and therefore cannot be considered as readily biodegradable.
- Executive summary:
The study investigated the ready biodegradability of 1272W94 when exposed to micro-organisms under aerobic conditions. the method followed the recommendations of OECD Guideines for Testing of Chemicals (1992) No. 301B "Ready Biodegradability; CO2 evolution test. 1272W94 attained 27% degradation after 28days and therefore cannot be considered as readily biodegradable.
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