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EC number: 203-095-9 | CAS number: 103-28-6
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water and sediment: simulation tests
- Type of information:
- calculation (if not (Q)SAR)
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Data is from computational model developed by USEPA
- Justification for type of information:
- Data is from computational model developed by USEPA
- Qualifier:
- according to guideline
- Guideline:
- other: Modeling database
- Principles of method if other than guideline:
- Fugacity Model by EPI Suite estimation database
- GLP compliance:
- not specified
- Radiolabelling:
- not specified
- Oxygen conditions:
- other: estimation
- Inoculum or test system:
- not specified
- Parameter followed for biodegradation estimation:
- test mat. analysis
- Compartment:
- other: water, material (mass) balance
- % Recovery:
- 25
- Compartment:
- other: sediment, material (mass) balance
- % Recovery:
- 0.361
- % Degr.:
- 50
- Parameter:
- other: Half-life in water
- Sampling time:
- 15 d
- Remarks on result:
- other: Other details not known
- % Degr.:
- 50
- Parameter:
- other: Half-life in sediment
- Sampling time:
- 135 d
- Remarks on result:
- other: Other details not known
- Compartment:
- water
- DT50:
- 15 d
- Type:
- other: estimated data
- Temp.:
- 25 °C
- Remarks on result:
- other: Other details not known
- Compartment:
- sediment
- DT50:
- 135 d
- Type:
- other: estimated data
- Temp.:
- 25 °C
- Remarks on result:
- other: Other details not known
- Transformation products:
- not specified
- Evaporation of parent compound:
- not specified
- Volatile metabolites:
- not specified
- Residues:
- not specified
- Validity criteria fulfilled:
- not specified
- Conclusions:
- Estimated half life of test chemical in water was 15 days (360 h) and in sediment estimated to be 135 days (3240 h).
- Executive summary:
Estimation Programs Interface (EPI) Suite (2017) prediction model was run to predict the half-life in water and sediment for the test chemical. If released into the environment, 25% of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period of test chemical in water is estimated to be 15 days (360 hrs). The half-life (15 days estimated by EPI suite) indicates that the chemical is not persistent in water and the exposure risk to aquatic animals is moderate to low whereas the half-life period of test chemical in sediment is estimated to be 135 days (3240 hrs). However, as the percentage release of test chemical into the sediment is less than 1% (i.e, reported as 0.361%), indicates that test chemical is not persistent in nature.
Reference
Mass Amount (percent) |
Half-Life (hr) |
Emissions (kg/hr) |
|
Water |
25 |
360 |
1000 |
Sediment |
0.361 |
3.24e+003 |
0 |
Fugacity (atm) |
Reaction (kg/hr) |
Advection (kg/hr) |
Reaction (percent) |
Advection (percent) |
|
Water |
4.6e-011 |
678 |
352 |
22.6 |
11.7 |
Sediment |
3.61e-011 |
1.09 |
0.102 |
0.0363 |
0.00339 |
Description of key information
Estimation Programs Interface (EPI) Suite (2017) prediction model was run to predict the half-life in water and sediment for the test chemical. If released into the environment, 25% of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period of test chemical in water is estimated to be 15 days (360 hrs). The half-life (15 days estimated by EPI suite) indicates that the chemical is not persistent in water and the exposure risk to aquatic animals is moderate to low whereas the half-life period of test chemical in sediment is estimated to be 135 days (3240 hrs). However, as the percentage release of test chemical into the sediment is less than 1% (i.e, reported as 0.361%), indicates that test chemical is not persistent in nature.
Key value for chemical safety assessment
- Half-life in freshwater:
- 15 d
- at the temperature of:
- 25 °C
- Half-life in freshwater sediment:
- 135 d
- at the temperature of:
- 25 °C
Additional information
Estimation Programs Interface (EPI) Suite (2017) prediction model was run to predict the half-life in water and sediment for the test chemical. If released into the environment, 25% of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period of test chemical in water is estimated to be 15 days (360 hrs). The half-life (15 days estimated by EPI suite) indicates that the chemical is not persistent in water and the exposure risk to aquatic animals is moderate to low whereas the half-life period of test chemical in sediment is estimated to be 135 days (3240 hrs). However, as the percentage release of test chemical into the sediment is less than 1% (i.e, reported as 0.361%), indicates that test chemical is not persistent in nature.
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