Synonyms: Fixanol Red FS;(3Z)-3-[[4-[4-[2-(2-imino-8-oxo-6-sulfonatonaphthalen-1-yl) hydrazinyl]phenyl]phenyl]hydrazinylidene]-6-oxocyclohexa-1, 4-diene-1-carboxylate; Diphenyl Red B; Direct Rose MN; Cutamin Red CF; Vondacel Red FN; Metachrome Red F;Airedale Red FD; Direct Red Kh;disodium;