Registration Dossier

Administrative data

Endpoint:
distribution modelling
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Study period:
2010-03-15
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Accepted calculation method

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2010
Report Date:
2010

Materials and methods

Model:
calculation according to Mackay, Level I
Calculation programme:
Self-made, equivalent to Level I V. 2.11 with standard settings
Release year:
2 010
Media:
air - biota - sediment(s) - soil - water

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
1,2,3,4-tetrahydronaphthalene as used in studies on input data

Study design

Test substance input data:
- Molar mass: 132.21
-Water solubility: 0.045 g/L
- Vapour pressure: 34 Pa
- log Pow: 3.78
- Melting point: -35.8



Environmental properties:
-Temperature: 20ºC
Volumes, densities, and organic carbon / fat concentration:
Air:         6 000 000 000 m3, 1.206 kg/m3
Water:           7 000 000 m3, 1000 kg/m3
Soil:               45 000 m3, 1500 kg/m3, 2 % OC
Sediment:           21 000 m3, 1300 kg/m3, 5 % OC
Susp. sediment:         35 m3, 1500 kg/m3, 16.7 % OC
Fish:                    7 m3, 1000 kg/m3, 5 % fat
Aerosol:              0.12 m3, 1500 kg/m3

Results and discussion

Percent distribution in media

Air (%):
94.644
Water (%):
2.694
Soil (%):
1.319
Sediment (%):
1.334
Susp. sediment (%):
0.009
Biota (%):
0.001
Aerosol (%):
0

Applicant's summary and conclusion

Conclusions:
According to a Mackay Level I model calculation the main target compartment for 1,2,3,4-tetrahydronaphthalene will be the atmosphere (94.6 %) followed by the hydrosphere (2.7 %), sediment and soil (1.3 % each).
Executive summary:

The distribution among different compartments of 1,2,3,4 -tetrahydronaphthalene was explored through the Mackay level I model calculations. According to this calculation the main target compartment for 1,2,3,4-tetrahydronaphthalene will be the atmosphere (94.6 %) followed by the hydrosphere (2.7 %), sediment and soil (1.3 % each).