Turnbull's Blue Pigment Preparation from Mexico
Turnbull's blue, a ferrous hexacyanoferrate pigment used in analytical chemistry stains and inks. Classified in HTS 3206.49.55.00 for hexacyanoferrate-based inorganic coloring matter. It offers a softer blue tone than Prussian blue.
Duty Rate — Mexico → United States
13.7%
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
• Lab-grade pigments require USP/ACS compliance certs for import validation
• Specify 'pigment and preparation' in commercial invoice to distinguish from raw salts
• Watch for misclassification as extenders if used in oil paints