| "Morphine sulfate occurs as white, feathery, silky crystals, cubical masses of crystals, or white crystalline powder; it is soluble in water and slightly soluble in alcohol. Morphine has a pKa of 7.9, with an octanol/water partition coefficient of 1.42 at pH 7.4. At this pH, the tertiary amino group is mostly ionized, making the molecule water-soluble. Morphine is significantly more water-soluble than any other opioid in clinical use.
Chemically, morphine sulfate is 7,8-didehydro-4,5 -epoxy-17-mtehyl-morphinian-3, 6 -diol sulfate(2:1)(salt)pentahydrate."
RxList - The Internet Drug Index
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