Methylene Blue Aqueous Solution 1% for Microscopy from Mexico
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.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify exact concentration and solvent composition to distinguish from medicinal preparations
• Include end-use statement for laboratory staining to prevent reclassification as pharmaceutical
• Package in leak-proof containers with proper UN hazardous goods declaration if >10% concentration