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Phenylhydrazine hydrochloride59-88-133 % similar 5,6-Diaminonaphthalene-1,3-disulfonic acid73692-57-633 % similar 7-Amino-4-hydroxy-2-naphthalenesulfonic acid87-02-533 % similar 4-(3-Methyl-5-oxo-2-pyrazolin-1-yl)benzenesulphonic acid89-36-133 % similar Gamma acid90-51-733 % similar O-Benzylglycine toluene-p-sulphonate1738-76-733 % similar Ensulizole27503-81-733 % similar Sulfosalicylic acid dihydrate5965-83-333 % similar 2-Amino-5-hydroxynaphthalene-1,7-disulphonic acid6535-70-233 % similar 5-Amino-2-(phenylamino)benzenesulfonic acid91-30-533 % similar 6-Amino-5-bromopyridine-3-sulfonic acid247582-62-333 % similar H Acid90-20-033 % similar 3-Nitrobenzenesulfonic acid98-47-533 % similar p-Nitrophenylhydrazine hydrochloride636-99-732 % similar 2,5-Diaminobenzenesulfonic acid88-45-932 % similar 2,4-Diaminobenzenesulfonic acid88-63-132 % similar 1-(4′-Sulfophenyl)-3-carboxy-5-pyrazolone118-47-832 % similar 4-Amino-5-hydroxy-1,7-naphthalenedisulfonic acid130-23-432 % similar 7-Amino-1,3,6-naphthalenetrisulfonic acid118-03-632 % similar 2-Sulfobenzoic acid632-25-732 % similar