2H-Naphtho1,2-dtriazole-5-sulfonic acid, 2-4-2-4-2-methyl-4-(7-sulfo-2H-naphtho1,2-dtriazol-2-yl)phenylazo-2-sulfophenylethenyl-3-sulfophenyl-, tetrasodium salt

tetrasodium 2-[4-[2-[4-[[2-methyl-4-(7-sulphonato-2H-naphtho[1,2-d]triazol-2-yl)phenyl]azo]-2-sulphonatophenyl]vinyl]-3-sulphonatophenyl]-2H-naphtho[1,2-d]triazole-5-sulphonate

2-[4-[2-[4-[[2-Methyl-4-[7-(sodiosulfo)-2H-naphtho[1,2-d]triazol-2-yl]phenyl]azo]-2-(sodiosulfo)phenyl]ethenyl]-3-(sodiosulfo)phenyl]-2H-naphtho[1,2-d]triazole-5-sulfonic acid sodium salt