Registration Dossier
Registration Dossier
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EC number: 211-838-3 | CAS number: 700-13-0
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Screening test; non-GLP.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 003
- Report date:
- 2003
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 A (Ready Biodegradability: DOC Die Away Test)
- GLP compliance:
- no
Test material
- Reference substance name:
- 2,3,5-trimethylhydroquinone
- EC Number:
- 211-838-3
- EC Name:
- 2,3,5-trimethylhydroquinone
- Cas Number:
- 700-13-0
- Molecular formula:
- C9H12O2
- IUPAC Name:
- 2,3,5-trimethylbenzene-1,4-diol
- Details on test material:
- - Name of test material (as cited in study report): 2,3,5-Trimethylhydrochinone
- Lot/batch No.: T5600/4703/04/25
- Analytical purity: >= 99.5 %;
water solubility: not indicated.
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic (adaptation not specified)
- Details on inoculum:
- - Concentration of sludge: 30 mg/l dry weight
- Duration of test (contact time):
- 28 d
Initial test substance concentrationopen allclose all
- Initial conc.:
- 20 mg/L
- Based on:
- DOC
- Initial conc.:
- 29 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- DOC removal
Reference substance
- Reference substance:
- aniline
Results and discussion
% Degradation
- Parameter:
- % degradation (DOC removal)
- Value:
- ca. 50 - ca. 60
- Sampling time:
- 28 d
- Details on results:
- Kinetic of test substance (in %):
ca. 18 after 3 day(s)
ca. 32 after 7 day(s)
ca. 41 after 14 day(s)
ca. 52 after 21 day(s)
ca. 65 after 28 day(s)
BOD5 / COD results
- Results with reference substance:
- Kinetic of control substance (in %):
= 10 after 3 day(s)
= 96 after 5 day(s)
Degradation products: not measured
Applicant's summary and conclusion
- Interpretation of results:
- other: DOC removal; partly or moderately biodegradable, not readily biodegradable according to OECD criteria;
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