Trisodium 1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6-disulfonate Hydrate, SULFANILIC ACID AZOCHROMOTROPE, SpadnsGr, 4,5-Dihydroxy-3-(4-sulfophenylazo)-2,7-naphthalenedisulfonic Acid Trisodium Salt Hydrate, 1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6-disulfonic Acid Trisodium Salt Hydrate, Sulfanilic acid azochromtrop, 2-(4-Sulfophenylazo)1,8-dihydroxy-3,6-naphthalenedisulfonic acid,trisodium salt,indicator grade, 2-(4-Sulfophenylazo)1,8-dihydroxy-3,6-naphthalenedisulfonic acid, Sulfanilic acid azochromotrop, TrisodiuM 2-(4-Sulfophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonate Hydrate, 2,7-naphthalenedisulfonic, SULFANILIC ACID-AZOCHROMOTROP