USPUSP-NF
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Allopurinol
C5H4N4O 136.11
4H-Pyrazolo[3,4-d]pyrimidin-4-one, 1,5-dihydro-;
1,5-Dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one;
1H-Pyrazolo[3,4-d]pyrimidin-4-ol [315-30-0]

DEFINITION

Allopurinol contains NLT 98.0% and NMT 102.0% of allopurinol (C5H4N4O), calculated on the dried basis.

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