USPUSP-NF
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Pyrimethamine
C12H13ClN4 248.71
 2,4-Pyrimidinediamine, 5-(4-chlorophenyl)-6-ethyl-.
 2,4-Diamino-5-(4-chlorophenyl)-6-ethylpyrimidine [58-14-0]

DEFINITION

Pyrimethamine contains NLT 98.0% and NMT 102.0% of pyrimethamine (C12H13ClN4) calculated on the dried basis.

USP REFERENCE STANDARDS FOR PURCHASE

USP Pyrimethamine RS
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