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        7,7'-(Carbonyldiimino)bis(4-hydroxy-2-naphthalenesulfonic acid) disodium salt

        C.A.S. No.: 20324-87-2

        Chemical Formula: C21H14O9N2S2Na2

        Molecular Weight: 548.461

        Chemical name:

        2-Amino Naphthylamine-4,8-Disulfonic Acid

         

         

        Appearance

        Grey Powder

        Coupling Value

        70% or 80% Min.

        Free J Acid

        3% Max.

        Insoluble in water

        1% Max.

        Packing

        25 kg woven bag



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