Certified Reference Methylene Blue Analytical Standard from Mexico
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.
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
• Include NIST traceability certificate and uncertainty measurements for reference material status
• Package in amber glass ampoules with inert atmosphere to maintain stability
• Declare as analytical standard rather than bulk chemical to facilitate laboratory import