Polymeric Methylene Diphenyl Diisocyanate (PMDI) from Canada
PMDI is a mixture of MDI oligomers, a chemically defined isocyanate for rigid polyurethane foams in insulation. Classified under HTS 2929.10.55.00 per additional U.S. note 3 to section VI for specific isocyanates.
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
• Confirm polymeric composition via assay certificates; use DOT-approved drums to avoid spills
• Pitfall: confusing with monomeric MDI leading to wrong subheading