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C.I. Fast Blue Base RR from China

C.I. Fast Blue Base RR is a sulfonamide fast color base used to produce brilliant blue shades in azo dyeing processes for cellulosic fibers. It diazotizes readily and couples efficiently with beta-naphthol for wash-fast colorations. Falls under HTS 2935.90.20.00 as specified fast color salt/base of sulfonamides.

Duty Rate — China → United States

112.5%

Rate breakdown

9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter

Import Tips

• Provide manufacturer's chemical structure data for Customs verification; store in cool, dry conditions to maintain diazotization capability; avoid bulk packaging over 25kg without stabilizers per safety transport note (f)