Registration Dossier
Registration Dossier
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EC number: 205-257-4 | CAS number: 136-77-6
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 016
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- 4-hexylresorcinol
- EC Number:
- 205-257-4
- EC Name:
- 4-hexylresorcinol
- Cas Number:
- 136-77-6
- Molecular formula:
- C12H18O2
- IUPAC Name:
- 4-hexylresorcinol
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- other: Secondary effluent of a treatment plant
- Details on inoculum:
- It was filtered through Whatman No 1 filter paper and incubated at test temperature 22± 2℃ in incubator for 6 days.
- Duration of test (contact time):
- ca. 28 d
Initial test substance concentration
- Initial conc.:
- ca. 2 mg/L
- Based on:
- formulation
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
Reference substance
- Reference substance:
- other: Potassium hydrogen phthalate
Results and discussion
% Degradationopen allclose all
- Parameter:
- % degradation (O2 consumption)
- Value:
- 0.39
- Sampling time:
- 7 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 1.96
- Sampling time:
- 14 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 7.83
- Sampling time:
- 21 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 11.36
- Sampling time:
- 28 d
BOD5 / COD results
- Results with reference substance:
- The percent degradation for reference substance on 7, 14, 21 and 28 day was 64.68, 80.85, 85.11 and 80.85%, respectively.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- not readily biodegradable
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