disodium,5-[(2Z)-2-(2-oxonaphthalen-1-ylidene)hydrazinyl]-2-[4-[(2Z)-2-(2-oxonaphthalen-1-ylidene)hydrazinyl]-2-sulfonatophenyl]benzenesulfonate; Polycor Red GS; Azo Milling Red G; Benzyl Red GS; Milling Red A; Korostan Red G; Pharmaglo Red G; Anthra Red G; Crispin Red GM; Acidred97(c.i.22890)