Crude MDI (Polymeric Methylene Diphenyl Diisocyanate) from Mexico
Crude MDI is a primary form polyisocyanate containing 95% or more methylene phenyl isocyanate monomer units by weight, used as a key raw material in polyurethane production. It falls under HTS 3909.31.00.00 as it precisely matches the subheading for poly(methylene phenyl isocyanate) in primary forms within amino-resins. This unprocessed chemical is supplied in drums for industrial formulation.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify monomer content exceeds 95% by weight via lab analysis to confirm classification under 3909.31
• Ensure SDS and REACH compliance for hazardous isocyanate handling
• Common pitfall: misclassifying refined MDI as it may shift to other subheadings