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4-Sulfonaphthalic anhydride potassium salt71501-16-141 % similar Eriochrome black T1787-61-741 % similar 1-Naphthalenediazonium, 2-hydroxy-4-sulfo-, inner salt887-76-340 % similar Acid orange 7633-96-540 % similar Alizarin red S130-22-340 % similar Potassium p-hydroxybenzenesulfonate30145-40-540 % similar Hydroxynaphthol blue63451-35-440 % similar Pigment red 49:11103-38-440 % similar Scarlet gn4548-53-240 % similar 1-Hydroxy-2-naphthoic acid86-48-640 % similar Tiron (chemical)149-45-139 % similar Nitroso R525-05-338 % similar Sodium 4,5-dihydroxy-3,6-bis[2-(2-sulfophenyl)diazenyl]-2,7-naphthalenedisulfonate (4:1)68504-35-838 % similar 2-Amino-1-naphthol hydrochloride41772-23-038 % similar Sodium 2-naphthalenesulfonate532-02-538 % similar C.I. Pigment red 53:15160-02-138 % similar Acid black 19461931-02-037 % similar Pigment red 63:16417-83-037 % similar Disodium 1,6-naphthalenedisulfonate1655-43-237 % similar Sodium 3,5-dichloro-2-hydroxybenzenesulfonate54970-72-837 % similar