USPUSP-NF
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Butabarbital
C10H16N2O3 212.25
2,4,6(1H,3H,5H)-Pyrimidinetrione, 5-ethyl-5-(1- methylpropyl)-;
5-sec-Butyl-5-ethylbarbituric acid [125-40-6]

DEFINITION

Butabarbital contains NLT 98.5% and NMT 101.0% of butabarbital (C10H16N2O3), calculated on the dried basis.

USP REFERENCE STANDARDS FOR PURCHASE

USP Butabarbital RS
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