Synonyms: Antipyrine,compd. with iron chloride (FeCl3) (3:2) (8CI); 3H-Pyrazol-3-one,1,2-dihydro-1,5-dimethyl-2-phenyl-, iron complex; Iron chloride (FeCl3), compd.with antipyrine (2:3); Antipyrine ferric chloride salt; Ferricchloride-antipyrine; Ferripyrine; Ferropyrine;Hexachlorotris(1,2-dihydro-1,5-dimethyl-2-phenyl-3H-pyrazol-3-one)diiron