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Environmental fate & pathways

Adsorption / desorption

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Description of key information

Adsorption to solid soil phase is not expected.

Key value for chemical safety assessment

Additional information

The adsorption potential of the reaction mass of phosphorothioic triamide, N-butyl- (NBPT) and phosphorothioic triamide, N-propyl- (NPPT) was

examined in a guideline study according to OECD 121. The determined logKoc of < 1.25 indicates that adsorption to solid soil phase is not expected.

Based on the structural similarities between NBPT and NPPT (NPPT is one CH2 -group shorter), it is very likely that the adsorption potential for NPPT itself to solid soil phase is not expected as well.