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Environmental fate & pathways

Adsorption / desorption

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Description of key information

The estimated adsorption coefficient (log10 Koc) values for the main test item components ranged from -0.5 to 7.0.

Key value for chemical safety assessment

Additional information

Adsorption Coefficient.

The adsorption coefficient of each of the test item constituents was estimated using a computer-based atom fragment contribution method, KOCWIN, version 2.00,© 2000-2008 U.S. Environmental Protection Agency.

The estimated adsorption coefficient (log10Koc) values are presented in the following table:

Constituent

Estimated log10Koc

MCI method

Kow method

1

6.9

2.1

2

10.5

6.2

3

5.9

3.6

4

9.5

7.0

5

6.3

1.6

6

6.3

2.0

7

2.3

-0.5

However, it is anticipated that partitioning forces with the organic carbon content of soils may not be the dominant force controlling the mobility of the test item in soils. Strong ionic interaction with clay particles, for example, will also influence the fate of the test item in soils.