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Environmental fate & pathways

Adsorption / desorption

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Description of key information

One study was identified.  The adsorption/desorption study was conducted using OECD Guideline 106 (Adsorption - Desorption Using a Batch Equilibrium Method) and following GLP. Mean soil Koc values of 132 (Spodosol, LogKoc = 2.12), 262 (Alfisol, LogKoc = 2.42) and 2290 (Entisol, LogKoc = 3.36) were obtained. The highest obtained value is used for CSA.

Key value for chemical safety assessment

Koc at 20 °C:
2 290

Additional information

Three soil types were studied. During the adsorption phase of the test, more than 25% of the test substance was adsorbed onto each soil type. The desorption phase of the study was performed on all three soil types. The total substance adsorbed to the soil was not recovered during the desorption phase of the study. The recovery decreased as the acidity of the soils decreased.

Mean soil Koc values of 132 (Spodosol), 262 (Alfisol) and 2290 (Entisol) were obtained in an OECD Guideline 106 Adsorption/Desorption study (at 22 deg C). There is an indication that for some soil types, adsorption to soil (LogKoc > 3) may be significant.