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MilliporeSigma

Metamizole impurity A

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European Pharmacopoeia (EP) Reference Standard

Synonym(s): 4-Formylaminoantipyrine; N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)formamide

Empirical Formula: C₁₂H₁₃N₃O₂

Formula Weight: 231.25

Linear Formula: C₁₂H₁₃N₃O₂

MDL Number: MFCD00085457

Beilstein Registry Number: 217665

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