... -2-sulfonic acid;2-Amino-5-naphthol-7-sulfonic acid;J acid; CAS NO : 87-02-5 7-Amino-4- ... 2-sulfonic acid;2-Amino-5-naphthol-7-sulfonic acid;J acid;6-Amino-1-naphthol-3-sulfonic acid;7-Amino ... cold water, slightly soluble in water, soluble in ethanol almost. J acid and ferric chloride solution total heat generation brown sediments ... can be used in the manufacture of Scarlet acid and J phenyl acid. J Acid