Registration Dossier

Administrative data

Endpoint:
distribution modelling
Type of information:
(Q)SAR
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification

Data source

Reference
Title:
Equilibrium Partitioning Model, Version 2.11.Fugacity Based Environmental
Author:
Trent Universit<
Year:
1999
Bibliographic source:
Trent University, 1999 Environmental Modelling Centre, Ontario, Canada.
Report Date:
1999

Materials and methods

Model:
calculation according to Mackay, Level I

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Test substance input data:
Melting point -16.7 °C
Boiling point 180.3 °C
Vapour pressure (at 25°C) 0.196 kPa
Partition coefficient (Log Pow) 3.4
Water solubility (at 25oC) 155.8 mg/L

Results and discussion

Percent distribution in media

Air (%):
94.6
Water (%):
2.5
Soil (%):
2.8
Sediment (%):
0.1
Susp. sediment (%):
0.1
Biota (%):
0.1
Aerosol (%):
0.1
Other distribution results:
0.1 means < 0.1

Applicant's summary and conclusion

Conclusions:
In a Mackay level distribution model the substance is mainly found in the air compartment.
Executive summary:

Fugacity modeling predicts that, at equilibrium, 1,2-dichlorobenzene will predominantly partition to the atmosphere (94.6%) with in the order of 2.8% partitioning to soil and 2.5% to water. Negligible amounts are expected to partition to other media such as aerosols and sediments (Trent University, 1999). Default settings were used in modeling which included air, water and soil compartments of 1 x 1014 m3, 2 x 1011 m3 and 9 x 109 m3 respectively with a release of 100,000 kg of chemical.