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Environmental fate & pathways

Adsorption / desorption

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Description of key information

The low log Koc value of diuron is 2.5.

Key value for chemical safety assessment

Koc at 20 °C:
395

Additional information

An absorption/desorption test is available for this substance in accordance with the prevailing OECD guidelines (OECD 106), with GLP. The adsorption/desorption characteristics of 5 soils were investigated. The adsorption Koc values ranged from 293 to 504 (Mean Koc = 395, corresponding to log Koc of 2.5). The desorption Koc values ranged from 370 to 934 (Mean Koc = 593) (Derz, 2009). The log Koc value of 2.5 indicates that Diuron has a minor tendecy to leach.

[LogKoc: 2.6]