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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)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Justification for type of information:
1. SOFTWARE
see Mackay, D. 2001. "Multimedia Environmental Models: The Fugacity Approach - Second Edition", Lewis Publishers, Boca Raton, pp. 1-261.

2. MODEL (incl. version number)
Mackay Level I v3.00

3. SMILES OR OTHER IDENTIFIERS USED AS INPUT FOR THE MODEL
- molar mass
- temperature
- water solubility
- vapor pressure
- melting point
- log kow

4. SCIENTIFIC VALIDITY OF THE MODEL
For details see Mackay, D. (2001); Mackay et al. (1996)

5. APPLICABILITY DOMAIN
For details see Mackay, D. (2001); Mackay et al. (1996)

6. ADEQUACY OF THE RESULT
A Level I calculation is not required under REACh but gives a general impression of the likely media into which a chemical will tend to partition and an indication of relative concentrations in each medium.

Data source

Reference
Reference Type:
other: Mackay Level I calculation
Title:
Unnamed
Year:
2015
Report Date:
2015

Materials and methods

Model:
calculation according to Mackay, Level I
Calculation programme:
Level I Version 3.0
Release year:
2 004
Media:
air - biota - sediment(s) - soil - water

Test material

Reference
Name:
Unnamed
Type:
Constituent
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): Bis(4-amino-3-methylcyclohexyl)methane

Study design

Test substance input data:
The following physico-chemical properties of the substance were used to calculate the distribution:
- molecular mass: 238.42 g/mol
- data temperature: 20 °C
- log Kow: 2.3 (1)
- water-solubility: 2010 g/m³ (25 °C) (1)
- Henry´s law constant: 9.49E-03 Pa*m³/mol (2)
- vapour pressure: 0.08 Pa (20°C) (3)
- melting point: -7.1 °C (4)

source:
(1) BASF SE, 2010; report no.: 09L00312
(2) Calculated by Mackay Level I program
(3) BASF AG, 1978; report no.: BRU 78.89
(4) Verschueren, 2001


Environmental properties:
Volume Density Org. C Fish lipid
(m³) (kg/m³) (g/g) (g/g)
air 6.0E+09 1.19
water 7.0E+06 1000
soil 45000 1500 0.02
sediment 21000 1300 0.05
susp. part. 35.0 1500 0.167
fish 7.0 1000 0.05
aerosole 0.120 1500

Results and discussion

Percent distribution in media

Air (%):
0.3
Water (%):
96.6
Soil (%):
1.5
Sediment (%):
1.5

Any other information on results incl. tables

Over time, the substance will preferentially distribute into the compartment water (96.6%) and to a minor extent into the compartments soil (1.5%), sediment (1.5%) and air (0,3%).

The data refer to the uncharged molecule (pKa value 1: 10.7). The substance is supposed to be charged under environmentally relevant conditions. Therefore the distribution into water may be still underestimated.


Applicant's summary and conclusion