1. TOBIAS ACID (2-Amino-1-naphthalenesulfonic)

2. J ACID (2-Amino-5-naphthol-7-sulfonic acid)

3. PHENYL J ACID (7-anilino-4-hydroxy-2-naphthalenesulfonic Acid)

4. J ACID UREA(5，5 DIHYDROXU-2，2 DINAPHTHYL UREA-7，7 DISULFONIC ACID)

5. H ACID (1-amino-8-naphthol-3, 6-disulfonic acid)

 

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All new products are important dyestuff intermediates, used for producing many dyestuffs as a material.