Synonyms: Mordant red 19;(5Z)-3-chloro-5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl) hydrazinylidene]-6-oxocyclohexa-1,3-diene-1-sulfonate; Metachrome Red 5G; Magracrom Red 5G; Monochrome Red 5G; Eriochrome Red 4G; Chrome Red 3G;sodium; Durochrome Red 5G; Superchrome Red G;