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%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Sensitizer warnings mandatory; biuret-trimer forms need separate checks
• Pitfall: confusing with cyclic forms in heading exclusions