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6-Aminopyridine-3-sulfonic acid16250-08-144 % similar Pyridine-2-sulfonic acid15103-48-743 % similar 5-Isoquinolinesulfonic acid27655-40-943 % similar Collidinium P-toluenesulfonate59229-09-343 % similar 4-Aminoazobenzene-4′-sulfonic acid104-23-442 % similar Naphthalene-2-sulfonic acid120-18-342 % similar 4-Pyridineethanesulfonic acid53054-76-542 % similar 3,4-Diaminobenzenesulfonic acid7474-78-442 % similar Metanilic acid121-47-141 % similar Potassium 4-carboxybenzenesulfonate5399-63-340 % similar Aniline-2,4-disulfonic acid137-51-939 % similar 2-Naphthol-6-sulfonic acid93-01-639 % similar 2-Amino-1,4-benzenedisulfonic acid98-44-239 % similar Naphthalene-2-sulfonic acid hydrate6036-00-638 % similar 6-Amino-2-naphthalenesulfonic acid93-00-538 % similar 3-Amino-4-hydroxybenzenesulfonic acid98-37-338 % similar Armstrong's acid81-04-938 % similar Chromotropic acid148-25-438 % similar 1-Naphthol-3,6-disulfonic acid578-85-837 % similar 3-Amino-4-methylbenzenesulfonic acid618-03-137 % similar