CAS RN: 299-42-3


The Henry's Law constant for (L)-ephedrine is estimated as 8.7X10-11 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This Henry's Law constant indicates that (L)-ephedrine is expected to be essentially nonvolatile from water surfaces(2). (L)-Ephedrine's Henry's Law constant indicates that volatilization from moist soil surfaces is not expected to occur(SRC). (L)-Ephedrine's is not expected to volatilize from dry soil surfaces(SRC) based upon an estimated vapor pressure of 0.0012 mm Hg(SRC), determined from a fragment constant method(1).
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