Also Called: 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-((4-sulfophenyl)azo)-, trisodium salt;2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(4-sulfophenyl)azo]-, trisodium salt;1,8-Dihydroxy-2-(4-sulfophenylazo) napthalene-3,6-disulfonic acid trisodium salt, >1% in a non hazardous diluent;1,8-Dihydroxy-2-(4-sulfophenylazo) napthalene-3,6-disulfonic acid trisodium salt, >1% in a non hazardous diluent;1,8-Dihydroxy-2-(4-sulphophenylazo) napthalene-3,6-disulphonic acid trisodium salt;2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[2-(4-sulfophenyl)diazenyl]-, sodium salt (1:3)