Registration Dossier
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EC number: 800-765-8 | CAS number: 1424149-03-0
Biodegradation in water and sediment: simulation tests
Administrative data
- Endpoint:
- biodegradation in water: sewage treatment simulation testing
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1992-10-20 to 1992-11-26
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Guideline study, limited reporting but plausible
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 993
- Report date:
- 1993
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 303 A (Simulation Test - Aerobic Sewage Treatment. A: Activated Sludge Units)
- GLP compliance:
- not specified
Test material
- Reference substance name:
- sodium/triethanolamine 4-((2-hydroxyethyl)amino)-3-pentaproenyl-4-oxobutanoate
- EC Number:
- 800-765-8
- Cas Number:
- 1424149-03-0
- Molecular formula:
- C21H40NO4.1/2Na.1/2C6H15NO3
- IUPAC Name:
- sodium/triethanolamine 4-((2-hydroxyethyl)amino)-3-pentaproenyl-4-oxobutanoate
- Details on test material:
- Anionic surfactant
Solid 88.&%, 11.4% water
Constituent 1
- Radiolabelling:
- no
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- Municipal waste water treatment plant Frankfurt-Niederrad
ca. 2.1 g dry sludge per liter in test and control unit - Duration of test (contact time):
- 37 d
Initial test substance concentration
- Initial conc.:
- 24.8 mg/L
- Based on:
- DOC
- Parameter followed for biodegradation estimation:
- DOC removal
- Details on study design:
- Acitvated sludge unit
6h residence time
Adaptation time 6d, pH 7.8-8.2
Temperature: 22 +/- 2 deg C
NH4+ < 1 mg/L, NO2- < 1 mg/L, NO3- 50-150 mg/L
Test duration: 37d, duration of measurement: 30d, evaluation phase 17d
Results and discussion
- Test performance:
- no deficiencies
% Degradation
- % Degr.:
- 62
- Parameter:
- DOC removal
- Sampling time:
- 17 d
- Remarks on result:
- other: Degradation rate of 62% is in line with the degradation rate found in an OECD 301D and 302B test (see IUCLID Chapter 5.2.1.
- Transformation products:
- not specified
Applicant's summary and conclusion
Validity criteria
- Validity criteria fulfilled:
- yes
- Conclusions:
- The registration substance was tested in an OECD 303A Sewage Treatment Plant Simulation Test over 37d using a test item concentration of 24.8 mg/L. After the run-in phase the test item was monitored over 17d using 24h composite samples and DOC Analysis. Based on these measurements a Biodegradation rate of 62% +/- 3% was determined. This biodegradation rate is in line with the degradation found in a ready and in an inherent test (see IUCLID Chapter 5.2.1).
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