Metamizole impurity A Price Not Available inquiry Metamizole impurity A Supplier Page Catalog Number APS1672588C Alternative Name(s) N-Antipyrinylformamide, NSC 60565, Metamizole Imp. A (EP), 4-(Formylamino)antipyrine,Metamizole Sodium Monohydrate Imp. A (EP), 4-Formamidoantipyrine, N-(2,3-Dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)formamide, Formamide, N-antipyrinyl- (6CI,7CI,8CI) Molecular Formula C12H13N3O2 CAS# 1672-58-8 Size inquiry Supplier Page https://reagents.alfa-chemistry.com/product/metamizole-impurity-a-cas-1672-58-8-52442.html