Registration Dossier
Registration Dossier
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EC number: 616-436-5 | CAS number: 77098-07-8
Biodegradation in water and sediment: simulation tests
Administrative data
- Endpoint:
- biodegradation in water: simulation testing on ultimate degradation in surface water
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- key study
- Study period:
- November 2009
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
- Justification for type of information:
- Estimation method (EPI Suite) recommended by IUCLID Guidance Document.
Data source
Reference
- Reference Type:
- other: software program
- Title:
- Estimation Programs Interface (EPI) Suite™ v3.20 for Microsoft® Windows
- Author:
- Anonymous
- Year:
- 2 010
- Bibliographic source:
- U.S. Environmental Protection Agency, Washington, DC, U.S.A. http://www.epa.gov/opptintr/exposure/pubs/episuite.htm
- Report date:
- 2018
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Properties of the Refernce Substance were modeled using EPI Suite v3.20.
- GLP compliance:
- no
Test material
- Reference substance name:
- 2-(2-hydroxyethoxy)ethyl 2-hydroxypropyl 3,4,5,6-tetrabromophthalate
- EC Number:
- 243-885-0
- EC Name:
- 2-(2-hydroxyethoxy)ethyl 2-hydroxypropyl 3,4,5,6-tetrabromophthalate
- Cas Number:
- 20566-35-2
- Molecular formula:
- C15H15Br4O7 (one ring component) C8 H2 Br4 O4 . C4 H10 O3 . C3 H8 O2 Unspecified reaction product of the three components
- IUPAC Name:
- 2-(2-hydroxyethoxy)ethyl 2-hydroxypropyl 3,4,5,6-tetrabromophthalate
- Details on test material:
- Modeling was based on the Reference Substance (CASRN 20566-35-2).
Constituent 1
- Radiolabelling:
- no
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- natural water: freshwater
- Duration of test (contact time):
- 4 wk
Initial test substance concentration
- Based on:
- other: not applicable
Results and discussion
% Degradation
- Key result
- % Degr.:
- 0.57
- Parameter:
- other: estimated value
- Remarks on result:
- other: % degr. estimated
Half-life of parent compound / 50% disappearance time (DT50)open allclose all
- Compartment:
- water
- DT50:
- 1 440 h
- Type:
- other: estimated
- Remarks on result:
- other: estimated value
- Compartment:
- other: water and sediment
- DT50:
- 12 960 h
- Type:
- other: estimated
- Remarks on result:
- other: estimated value
- Compartment:
- other: soil
- DT50:
- 2 880 h
- Type:
- other: estimated
- Remarks on result:
- other: estimated value
- Transformation products:
- not specified
Any other information on results incl. tables
Biodegradation predictions.
5.2 Biodegradation |
||
Water |
LEVEL III Fugacity Model using Biowin Ulitmate, AOPwin |
Half-life: 1440 hours |
Water and Sediment |
LEVEL III Fugacity Model using Biowin Ulitmate, AOPwin |
Half-life in sediment: 1.296E+004 hours |
Soil |
LEVEL III Fugacity Model using Biowin Ulitmate, AOPwin |
Half-life: 2880 hours |
Mode of Degradation in Actual Use |
STP Fugacity Model BIOWIN (v4.10) |
Primary sludge: 37.88%, Waste Sludge 24.21%, Total Biodegradation 0.57%, Total Removal 62.65%, Final Water Effluent 37.35% Linear Model: Does Not Biodegrade Fast Non-Linear Model: Does Not Biodegrade Fast Ultimate Biodegradation Timeframe: Months Primary Biodegradation Timeframe: Weeks-Months MITI Liner Model: Biodegrades Fast MITI Non-Linear Model: Does Not Biodegrade Fast Anaerobic Model: Biodegrades Fast Ready Biodegradation Prediction: NO |
Applicant's summary and conclusion
Validity criteria
- Validity criteria fulfilled:
- not applicable
- Conclusions:
- In a sewage treatment plant, the reference substance is predicted to partition to Primary sludge (37.88%) and Waste Sludge(24.21%). Removal by biodegradtion is expected to be minimal (0.57%). The total removal by the STP is expected to be 62.65% with the final water effluent containing 37.25%. Biodegradation in water or water/sediment is not expected.
- Executive summary:
In a sewage treatment plant, the reference substance is predicted to partition toPrimary sludge (37.88%) and Waste Sludge(24.21%). Removal by biodegradtion is expected to be minimal (0.57%). The total removal by the STP is expected to be 62.65% with the final water effluent containing 37.25%. Biodegradation in water or water/sediment is not expected.
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