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Environmental fate & pathways

Distribution modelling

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Administrative data

Endpoint:
distribution modelling
Type of information:
calculation (if not (Q)SAR)
Remarks:
Estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Accepted calculation method

Data source

Materials and methods

Model:
calculation according to Mackay, Level I
Calculation programme:
Level 1 Model - Fugacity-based environmental equilibrium partitioning model; programme v3.0, Trent University, 2004.
Media:
other: air - water - soil - sediment

Test material

Constituent 1
Chemical structure
Reference substance name:
Tris(2-butoxyethyl) phosphate
EC Number:
201-122-9
EC Name:
Tris(2-butoxyethyl) phosphate
Cas Number:
78-51-3
Molecular formula:
C18H39O7P
IUPAC Name:
tris(2-butoxyethyl) phosphate
Details on test material:
- Name of test material: tris(2-butoxethyl) phosphate):

Study design

Test substance input data:
- Molar mass: 398.54
- Data temperature: 25°C
- Water solubility: 663.5 mg/L
- Vapour pressure: 1.52E-5 Pa
- log Pow: 3.75
- Melting point :-70 deg C

Results and discussion

Percent distribution in media

Air (%):
0
Water (%):
16.4
Soil (%):
81.7
Sediment (%):
1.82
Susp. sediment (%):
0.057
Biota (%):
0.005
Aerosol (%):
0

Any other information on results incl. tables

Table 5.4.3/1 : Environmental distribution (as %) calculated from the above parameters using the Makay Level 1 Model.

Compartment

%

Air

2.92E-05%

Soil

81.7%

Water

16.4%

Fish

4.6E-03%

Sediment

1.82%

Applicant's summary and conclusion

Conclusions:
According calculations using Makay Level 1 Model, TBEP is mainly distributed in soil (81.7%) and in less extent in water (16.4%). However this does not take into account any biodegradation of the substance. As TBEP is readily biodegradable the substance will be removed in the STP and the remaining concentrations in each compartment will be much lower.