USPUSP-NF
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Butalbital
C11H16N2O3 224.26
2,4,6(1H,3H,5H)-Pyrimidinetrione, 5-(2-methylpropyl)-5-(2-propenyl)-;
5-Allyl-5-isobutylbarbituric acid [77-26-9]

DEFINITION

Butalbital contains NLT 98.0% and NMT 102.0% of butalbital (C11H16N2O3), calculated on the dried basis.

USP REFERENCE STANDARDS FOR PURCHASE

USP Butabarbital RS
USP Butalbital RS
USP Salicylic Acid RS
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