6598-60-3

7-[[4-[(4-Amino-3-sodiosulfophenyl)azo]-2-ethoxy-1-naphthalenyl]azo]-6-hydroxy-2-[3-[(2,4-dihydroxyphenyl)azo]phenyl]-1H-naphth[1,2-d]imidazole-8-sulfonic acid sodium salt