CAS RN: 90-82-4

Soil Adsorption / Mobility

The Koc of pseudoephedrine is estimated as 73(SRC), using a log Kow of 0.89(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that pseudoephedrine is expected to have high mobility in soil. However, the pKa of pseudoephedrine is 10.25(4), indicating that this compound will primarily exist in the cation form in the environment and cations generally adsorb more strongly to soils containing organic carbon and clay than their neutral counterparts(5).
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