HDI Stabilized with 0.02% HDB Catapult
Industrial 1,6-hexamethylene diisocyanate stabilized with proprietary 0.02% HDB Catapult additive to prevent yellowing during storage. HTS 2929.10.3500 applies per Chapter note (f) for added stabilizers necessary for transport. Standard for non-yellowing wood floor coatings.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If esterified derivative rather than pure diisocyanate
Chapter note 4(A) classifies esters with later-function compound; shifts oxygen function priority
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
• Include stabilizer specification sheet; additions must be 'solely for safety/transport' per Chapter note (f)
• IBC totes (1000L) common—verify UN 2281 approval and secondary containment
Related Products under HTS 2929.10.35.00
HDI Biuret Trimer (Desmodur N 100)
HDI Biuret trimer is a high-functionality polyisocyanate derived from 1,6-hexamethylene diisocyanate, containing residual monomeric HDI (<0.25%). It qualifies under HTS 2929.10.3500 as an isocyanate per Chapter notes allowing derivatives of listed compounds. Primarily used as crosslinking agent in durable industrial coatings.
1,6-Hexamethylene Diisocyanate (HDI)
1,6-Hexamethylene diisocyanate (HDI) is a chemically defined aliphatic diisocyanate with the formula OCNC6H12NCO, used primarily as a reactive intermediate in polyurethane production. It falls under HTS 2929.10.3500 as an isocyanate compound with other nitrogen function, specifically named in the tariff schedule. This clear, colorless liquid is essential for creating durable coatings and adhesives.
Desmodur H Diisocyanate
Desmodur H is the commercial trade name for high-purity 1,6-hexamethylene diisocyanate (HDI) produced by Covestro, stabilized with <0.1% benzoyl chloride for transport. Classed under HTS 2929.10.3500 as the specifically named isocyanate per Chapter 29 notes (f) allowing stabilizers. Used in two-component polyurethane paints for automotive clearcoats.
Monodisperse HDI (Purified 99.5%)
Laboratory-grade 1,6-hexamethylene diisocyanate with 99.5% purity, minimal isomeric impurities, packaged in 1-5kg quantities for R&D. Falls squarely under HTS 2929.10.3500 as chemically defined isocyanate per Chapter note (a). Used in synthesis of biomedical polyurethanes and adhesives.