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"Use of 1-amino-2,7-di-[5'-((2""-chloro-4""-substituted amino-1,3,5-triazin-6-ylamino)-2'-sulfophenylazo]-8-hydroxynaphthalene-3 ,6-disulfonic acids for dyeing and printing"

US Patent 5188640 · Granted Feb 23, 1993

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