MDI Flakes (Stabilized Solid Form)
MDI flakes are solidified, stabilized methylenedi-p-phenylene isocyanate designed for easier handling and transport, classified under HTS 2929.10.80.10 as the pure compound with added stabilizer (Chapter Note 1(f)). Used in polyurethane systems requiring controlled reactivity.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If stabilizer addition renders it suitable for specific formulation use
Excessive or functional additives making it 'particularly suitable for specific use' (Note 1(g)) shifts to prepared binders.
If for other isocyanates in flake form like TDI flakes
Different isocyanate compounds like toluene diisocyanate classify under the 'other' subheading 2929.90.
If containing unsaturated polyester components
Blends with polyester polyols for specific resin systems fall under Chapter 39 polyesters.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Document stabilizer type and concentration (<1% typically) to qualify under Chapter Note 1(f) allowances
• Monitor melting point specs (around 40°C) to prevent solid-to-liquid transition during ocean transit
• Declare exact isocyanate content as active ingredient for accurate duty assessment
Related Products under HTS 2929.10.80.10
Methylenedi-p-Phenylene Isocyanate (MDI)
MDI is a diisocyanate compound featuring two isocyanate (-NCO) functional groups attached to a methylene-bridged diphenyl structure, classifying it under HTS 2929.10.80.10 as an isocyanate with other nitrogen function. It is primarily used in the production of polyurethane foams, coatings, and adhesives due to its reactivity with polyols.
Polymeric Diphenylmethane Diisocyanate (PMDI)
PMDI is a polymeric form of MDI containing oligomeric isocyanate species with higher functionality, still classified under HTS 2929.10.80.10 due to its predominant isocyanate nitrogen functions. It is widely used in rigid polyurethane foam production for insulation and construction applications.
Monometric 4,4'-MDI (Pure Diphenylmethane-4,4'-Diisocyanate)
Pure 4,4'-MDI is the monomeric isomer of methylenedi-p-phenylene isocyanate, featuring isocyanate groups specifically at the para positions, falling under HTS 2929.10.80.10. It serves as a building block for high-performance polyurethanes in elastomers and coatings.