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Environmental fate & pathways

Adsorption / desorption

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Description of key information

Log Koc= 8.7157

Koc= 5.196E8 L/Kg

Key value for chemical safety assessment

Koc at 20 °C:
519 600 000

Additional information

The Soil Adsorption Coefficient (Koc) of ‘Esterification products of 1,3-dioxo-2-benzofuran-5-carboxylic acid with nonan-1-ol’, calculated using the EPA model KOCWIN v2.00, is in the range:

Log Koc = 8.4551 ÷ 9.2370 corresponding to (2.852 ÷ 17.26)E+8 L/kg (MCI method)

Log Koc = 7.8648 ÷ 8.6871 corresponding to (0.732 ÷ 4.865)E+8 L/kg (log Pow method)

Overall, the MCI methodology is somewhat more accurate than the Log Kow methodology, although both methods yield good results.

The key value is within the estimation range of the predicted (log) Koc of the 15 principal components of the assessed UVCB substance.

According to the McCall classification scheme, this means that the above UVCB substance is immobile (Koc > 5000) on soil.

These estimates are supported by experimental data on a close structural analogue of the registered substance which found a Log Koc >5.67