Monodisperse HDI (Purified 99.5%) from Canada
Laboratory-grade 1,6-hexamethylene diisocyanate with 99.5% purity, minimal isomeric impurities, packaged in 1-5kg quantities for R&D. Falls squarely under HTS 2929.10.3500 as chemically defined isocyanate per Chapter note (a). Used in synthesis of biomedical polyurethanes and adhesives.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Small package sizes trigger additional scrutiny—include end-use statement to avoid 'retail packing' reclassification
• Temperature control (<30°C) mandatory during shipping to prevent dimerization