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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

9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada

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