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EC number: 204-320-3 | CAS number: 119-40-4
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)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: 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:
- no
- Radiolabelling:
- not specified
- Oxygen conditions:
- other: estimation
- Inoculum or test system:
- not specified
- Parameter followed for biodegradation estimation:
- test mat. analysis
- Reference substance:
- not specified
- Compartment:
- other: water, material (mass) balance
- % Recovery:
- 11.2
- Compartment:
- other: sediment, material (mass) balance
- % Recovery:
- 1.67
- % Degr.:
- 50
- Parameter:
- other: Half life in water
- Sampling time:
- 37.5 d
- Remarks on result:
- other: 50% Biodegradation in water= 37.5 d
- % Degr.:
- 50
- Parameter:
- other: half life in sediment
- Sampling time:
- 337.5 d
- Remarks on result:
- other: 50% Biodegradtion in sediment = 337.5 d
- Compartment:
- water
- DT50:
- 37.5 d
- Type:
- other: estimated
- Temp.:
- 25 °C
- Remarks on result:
- other: Other details not known
- Compartment:
- sediment
- DT50:
- 337.5 d
- Type:
- other: estimated
- 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 4-Hydroxy-7-(phenylamino) naphthalene-2-sulfonic acid in water was 37.5 days (900 h) and in sediment estimated to be 337.5 days (8100 h).
- Executive summary:
Estimation Programs Interface (EPI) Suite (2016) prediction model was run to predict the half-life in water and sediment for the test compound 4-Hydroxy-7-(phenylamino) naphthalene-2-sulfonic acid (CAS No. 119 -40 -4). If released in to the environment, 11.2 % of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period of 4-Hydroxy-7-(phenylamino) naphthalene-2-sulfonic acid in water is estimated to be 37.5 days (900 hrs). The half-life (37.5 days estimated by EPI suite) indicates that the exposure risk to aquatic animals is moderate to low whereas the half-life period of 4-Hydroxy-7-(phenylamino) naphthalene-2-sulfonic acid in sediment is estimated to be 337.5 days (8100 hrs). However, as the percentage release of test chemical into the sediment is less than 5% (i.e, reported as 1.67%), indicates that
4-Hydroxy-7-(phenylamino) naphthalene-2-sulfonic acid is not persistent in nature.
Reference
Mass Amount (percent) | Half-Life (hr) | Emissions (kg/hr) | |
Water | 11.2 | 900 | 1000 |
Sediment | 1.67 | 8.1e+003 | 0 |
Fugacity (atm) | Reaction (kg/hr) | Advection (kg/hr) | Reaction (percent) | Advection (percent) | |
Water | 4.93e-023 | 483 | 627 | 16.1 | 20.9 |
Sediment | 5.79e-023 | 8.02 | 1.87 | 0.267 | 0.0625 |
Description of key information
Estimation Programs Interface (EPI) Suite (2016) prediction model was run to predict the half-life in water and sediment for the test compound 4-Hydroxy-7-(phenylamino) naphthalene-2-sulfonic acid (CAS No. 119 -40 -4). If released in to the environment, 11.2 % of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period of 4-Hydroxy-7-(phenylamino) naphthalene-2-sulfonic acid in water is estimated to be 37.5 days (900 hrs). The half-life (37.5 days estimated by EPI suite) indicates that the exposure risk to aquatic animals is moderate to low whereas the half-life period of 4-Hydroxy-7-(phenylamino) naphthalene-2-sulfonic acid in sediment is estimated to be 337.5 days (8100 hrs). However, as the percentage release of test chemical into the sediment is less than 5% (i.e, reported as 1.67%), indicates that 4-Hydroxy-7-(phenylamino) naphthalene-2-sulfonic acid is not persistent in nature.
Key value for chemical safety assessment
- Half-life in freshwater:
- 37.5 d
- at the temperature of:
- 25 °C
- Half-life in freshwater sediment:
- 337.5 d
- at the temperature of:
- 25 °C
Additional information
Estimation Programs Interface (EPI) Suite (2016) prediction model was run to predict the half-life in water and sediment for the test compound 4-Hydroxy-7-(phenylamino) naphthalene-2-sulfonic acid(CAS No. 119 -40 -4). If released in to the environment, 11.2 % of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period of 4-Hydroxy-7-(phenylamino) naphthalene-2-sulfonic acidin water is estimated to be 37.5 days (900 hrs). The half-life (37.5 days estimated by EPI suite) indicates that the exposure risk to aquatic animals is moderate to low whereas the half-life period of 4-Hydroxy-7-(phenylamino) naphthalene-2-sulfonic acidin sediment is estimated to be 337.5 days (8100 hrs). However, as the percentage release of test chemical into the sediment is less than 5% (i.e, reported as 1.67%), indicates that
4-Hydroxy-7-(phenylamino) naphthalene-2-sulfonic acidis not persistent in nature.
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