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%).
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pre-mixed with other active ingredients for finished dosage forms
Medicinal mixtures containing this dye classify under Chapter 30 as human medicaments.
If chemically modified for specific therapeutic derivatives
Heterocyclic compound derivatives shift to Chapter 29 if not primarily coloring matter.
If for other unnamed basic blue dyes in crystalline form
Different basic dyes have separate purity subheadings within 3204.13.
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Import Tips & Compliance
• Submit FDA Drug Master File or DMF reference if destined for US pharmaceutical compounding
• Provide heavy metals and residual solvent analysis certificates for purity verification
• Avoid bulk packaging over 25kg to prevent scrutiny as industrial chemical rather than pharma intermediate
Related Products 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.
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.