Polymeric MDI (PMDI) Resin from Mexico
PMDI is a crude poly(methylene phenyl isocyanate) oligomer mixture used in rigid foam manufacturing, meeting the 95% monomer unit threshold per subheading rules. Classified under HTS 3909.31.00.00 as a primary form amino-resin precursor for polyurethane systems. Typically shipped in ISO tanks for large-scale industrial use.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Obtain manufacturer's certificate confirming crude/polymeric status and monomer composition to avoid reclassification
• Comply with TSCA import requirements for new chemicals
• Watch for drum residue contamination leading to waste classification issues