3,7-Bis(dimethylamino) phenazathionium chloride (Methylene blue); and Basic blue 147
Synthetic organic coloring matter, whether or not chemically defined; preparations as specified in note 3 to this chapter based on synthetic organic coloring matter; synthetic organic products of a kind used as fluorescent brightening agents or as luminophores, whether or not chemically defined: > Synthetic organic coloring matter and preparations based thereon as specified in note 3 to this chapter: > Basic dyes and preparations based thereon: > 3,7-Bis(dimethylamino) phenazathionium chloride (Methylene blue); and Basic blue 147
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 3204.13.45.00
Methylene Blue Powder USP Grade
High-purity 3,7-Bis(dimethylamino) phenazathionium chloride (Methylene blue) powder meeting USP standards for pharmaceutical applications. Classified under HTS 3204.13.45.00 as a specific basic dye, chemically defined synthetic organic coloring matter. Used primarily as a medication and diagnostic stain rather than a textile colorant.
Basic Blue 147 Dye for Textile Application
Synthetic basic dye Basic Blue 147, specifically named in HTS 3204.13.45.00, used for coloring acrylic and wool fibers. Provided as a water-soluble powder or solution for industrial dyeing processes. Meets chapter note 3 as chemically defined synthetic organic coloring matter.
Methylene Blue Aqueous Solution 1% for Microscopy
1% aqueous solution of Methylene Blue (3,7-Bis(dimethylamino) phenazathionium chloride) for biological staining in microscopy. Classified under HTS 3204.13.45.00 as the specifically named basic dye, even in dilute solution form. Excludes non-aqueous dispersions per chapter notes.
Pharmaceutical Grade Methylene Blue Crystals
Purified crystalline Methylene Blue (CAS 61-73-4) for compounding in pharmaceutical applications like antimalarial treatments. HTS 3204.13.45.00 specifically names this chemically defined basic dye. Distinguished from bulk preparations by high purity (>99%).
Basic Blue 147 Powder for Paper Dyeing
High-strength Basic Blue 147 powder specifically for surface coloring of paper and cardboard products. Named directly in HTS 3204.13.45.00 as synthetic organic basic dye. Provides brilliant blue shades with good light fastness on paper substrates.
Methylene Blue for Aquaculture Treatment
Methylene Blue solution or powder formulated for fish disease treatment in aquaculture. Classified under HTS 3204.13.45.00 as the named basic dye, provided for veterinary staining and therapeutic use. Purity suitable for aquatic organism treatment.
Certified Reference Methylene Blue Analytical Standard
Certified reference material of Methylene Blue (3,7-Bis(dimethylamino) phenazathionium chloride) at 99.5%+ purity for analytical chemistry calibration. HTS 3204.13.45.00 covers this specifically named basic dye used as HPLC/UV standard. Traceable to NIST standards.
Basic Blue 147 for Ink Manufacturing
High-purity Basic Blue 147 specifically for incorporation into flexographic and gravure printing inks. Named in HTS 3204.13.45.00 as synthetic organic basic dye. Excellent transparency and brilliance for packaging ink applications.