Registration Dossier
Registration Dossier
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EC number: 204-552-5 | CAS number: 122-52-1
Biodegradation in water and sediment: simulation tests
Administrative data
- 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)
Data source
Reference
- Reference Type:
- other: Prediction model
- Title:
- Bio-degradation in water and sediment by EPI (Estimation Programs Interface) Suite
- Author:
- Sustainability Support Service (Europe) AB - estimated
- Year:
- 2 011
- Bibliographic source:
- Estimation Programs Interface Suite™ United States Environmental Protection Agency, Washington, DC, USA. version 4.1
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: Modelling database
- Principles of method if other than guideline:
- Fugacity Model by EPI Suite estimation database
- GLP compliance:
- no
Test material
- Reference substance name:
- Triethyl phosphite
- EC Number:
- 204-552-5
- EC Name:
- Triethyl phosphite
- Cas Number:
- 122-52-1
- Molecular formula:
- C6H15O3P
- IUPAC Name:
- triethyl phosphite
- Details on test material:
- - Name of test material (as cited in study report): triethyl phosphite
- Substance type: Organic
- Physical state: liquid
Constituent 1
- Radiolabelling:
- not specified
Study design
- Oxygen conditions:
- other: estimation
- Inoculum or test system:
- not specified
- Parameter followed for biodegradation estimation:
- test mat. analysis
Reference substance
- Reference substance:
- not specified
Results and discussion
Mean total recoveryopen allclose all
- Compartment:
- other: water, material (mass) balance
- % Recovery:
- 23.4
- Compartment:
- other: sediment, material (mass) balance
- % Recovery:
- 1.07
% Degradationopen allclose all
- % Degr.:
- 50
- Parameter:
- other: Half life
- Sampling time:
- 15 d
- Remarks on result:
- other: 50% degradation found in water
- % Degr.:
- 50
- Parameter:
- other: Half life
- Sampling time:
- 135 d
- Remarks on result:
- other: 50% degradation found in sediment
Half-life of parent compound / 50% disappearance time (DT50)open allclose all
- Compartment:
- water
- DT50:
- 15 d
- Type:
- other: estimated
- Remarks on result:
- other: 360 h = 15 d
- Compartment:
- sediment
- DT50:
- 135 d
- Type:
- other: estimated
- Remarks on result:
- other: 3240 h = 135 d
- Transformation products:
- not specified
- Evaporation of parent compound:
- not specified
- Volatile metabolites:
- not specified
- Residues:
- not specified
Applicant's summary and conclusion
- Conclusions:
- According to EPI (Estimation Programs Interface) Suite , estimated half-life for triethyl phosphite in water is 15 days which shows fast degradation whereas half life for sediment is 135 d shows slow degradation.
- Executive summary:
Mass Amount (percent)
Half-Life (hr)
Emissions (kg/hr)
Water
23.4
360
1000
Sediment
1.07
3.24e+003
0
Fugacity (atm)
Reaction (kg/hr)
Advection (kg/hr)
Reaction (percent)
Advection (percent)
Water
2.41e-010
614
319
20.5
10.6
Sediment
1.66e-010
3.11
0.291
0.104
0.0097
Persistence Time: 456 hr
Reaction Time: 522 hr
Advection Time: 3.56e+003 hr
Percent Reacted: 87.2
Percent Advected: 12.8
Half-Lives (hr), (based upon Biowin (Ultimate) and Aopwin):
Air: 4.43
Water: 360
Soil: 720
Sediment: 3240
Biowin estimate: 2.832 (weeks )
Advection Times (hr):
Air: 100
Water: 1000
Sediment: 5e+004
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