Hexamethylene Diisocyanate (HDI) from Canada
HDI is an aliphatic diisocyanate for lightfast polyurethane coatings, chemically defined under chapter scope. Classified in HTS 2929.10.55.00 due to inclusion in additional U.S. note 3.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Sensitizer warnings mandatory; biuret-trimer forms need separate checks
• Pitfall: confusing with cyclic forms in heading exclusions