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Antipyrine
C11H12N2O 188.23
 1,2-Dihydro-1,5-dimethyl-2-phenyl-3H-pyrazol-3-one;
 2,3-Dimethyl-1-phenyl-3-pyrazolin-5-one [60-80-0]

DEFINITION

Antipyrine contains NLT 98.0% and NMT 102.0% of antipyrine (C11H12N2O), calculated on the dried basis.

USP REFERENCE STANDARDS FOR PURCHASE

USP Antipyrine RS
USP Antipyrine Related Compound A RS
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