Crude MDI (Polymeric Methylene Diphenyl Diisocyanate)
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If refined or monomeric MDI
Pure diisocyanates like monomeric MDI are classified under Chapter 29 as organic chemicals, not polymers in primary forms.
If polyurethane prepolymer form
Prepolymers reacted with polyols become polyurethanes, shifting to the subheading for other polyurethanes.
If blended with additives beyond polymer criteria
Chemical preparations not meeting pure polymer monomer predominance fall under mixtures in Chapter 38.
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Import Tips & Compliance
• 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
Related Products under HTS 3909.31.00.00
Polymeric MDI (PMDI) Resin
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.
Lupranate M20R Polymeric MDI
Lupranate M20R is a commercial grade crude MDI with high isocyanate functionality for spray foam insulation production, qualifying under 3909.31 due to predominant monomer units. This primary form chemical is essential for reacting with polyols in polyurethane formulations. Supplied in bulk for construction industry applications.
Suprasec 5005 Crude MDI
Suprasec 5005 is a polymeric MDI variant for CASE (coatings, adhesives, sealants, elastomers) applications, classified in HTS 3909.31.00.00 for its primary poly(methylene phenyl isocyanate) composition. Meets subheading note (a)(1) with ≥95% relevant monomer content. Used in two-component industrial systems.
Polyurethane Precursor P-MDI 44V20L
P-MDI 44V20L is a low-viscosity crude polymeric MDI for flexible foam precursors, falling under HTS 3909.31.00.00 per polymer classification rules for monomer predominance. Primary form essential for slabstock and molded foam production. Bulk liquid chemical for resin manufacturers.
Industrial Grade Polymeric MDI (MDI-P)
Industrial MDI-P is crude poly(methylene phenyl isocyanate) for binding wood panels in OSB production, precisely matching HTS 3909.31.00.00 criteria. Primary polymer form used in isocyanate wood glue systems. High-functionality oligomer for structural composites.
BASF Lupranat MP 102 Polymeric MDI
BASF Lupranat MP 102 is a polymeric MDI for continuous panel lines, classified under HTS 3909.31.00.00 as crude poly(methylene phenyl isocyanate) meeting purity standards. Primary form for rigid polyurethane insulation boards. Supplied in heated railcars.