Monodisperse HDI (Purified 99.5%) from Japan
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.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Small package sizes trigger additional scrutiny—include end-use statement to avoid 'retail packing' reclassification
• Temperature control (<30°C) mandatory during shipping to prevent dimerization