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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If blended with stabilizers or other additives exceeding 1% by weight
Mixtures of basic dyes with non-coloring additives fall under other basic dye subheadings rather than specifically named pure compounds.
If put up in retail packaging under 1 kg for end-user staining kits
Dyes packaged for retail sale shift to heading 3212, excluding chapter note exclusions for chemically defined coloring matter.
If pre-formulated as bulk medicinal preparation with excipients
When mixed with pharmaceutical carriers for direct therapeutic use, classification moves to Chapter 30 as medicaments.
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Import Tips & Compliance
• Provide Safety Data Sheet (SDS) and Certificate of Analysis confirming 98%+ purity and USP compliance
• Declare exact chemical identity and CAS number (61-73-4) to avoid misclassification as general preparations
• Ensure proper hazardous material labeling if shipped in powder form exceeding certain concentrations
Related Products under HTS 3204.13.45.00
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.