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HSChapter 29
U.S. imports of isocyanates (HS 292910) totaled $8.4M in April 2026, traded with 16 countries.
Last updated: April 2026 dataSeveral lines within this heading carry Section 301 exposure, making origin a critical classification variable for US importers of these highly reactive industrial chemicals. Isocyanates — including toluene diisocyanate (TDI, covered under 2929101000 and 2929101500), methylene diphenyl diisocyanate (MDI, 2929108010), and hexamethylene diisocyanate (HDI, 2929103500) — are primary building blocks for polyurethane foams, coatings, adhesives, and elastomers. Germany leads US supply, followed by Hungary and China, reflecting the concentration of large-scale TDI and MDI production in Europe and Asia. Importers should verify whether specific isocyanate variants fall under chemical weapons convention-related controls or EPA TSCA reporting requirements.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Unmixed toluene diisocyanates (TDI) are classified under 2929101000, while 2,4- and 2,6-TDI mixtures fall under 2929101500. Methylene diphenylene isocyanate (MDI) has its own dedicated line at 2929108010. Importers should confirm the exact chemical identity and mixture status before filing, as misclassification between these lines can affect applicable duty rates and Section 301 exposure.
Isocyanates are not subject to FDA or USDA admissibility review, but certain variants — particularly those with dual-use potential — may require EPA TSCA certification or be subject to export/import controls under chemical weapons convention schedules. Importers should consult a licensed customs broker and verify TSCA compliance obligations before shipment.
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Monthly import values over time