Pseudoephedrine

CAS RN: 90-82-4

Volatilization

A pKa of 10.25(1) indicates pseudoephedrine will exist almost entirely in the cation form at pH values of 5 to 9 and therefore volatilization from water surfaces is not expected to be an important fate process. Pseudoephedrine is not expected to volatilize from dry soil surfaces(SRC) based upon an estimated vapor pressure of 8.3X10-4 mm Hg(SRC), determined from a fragment constant method(2).
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