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2929.10.80.90/Hexamethylene Diisocyanate (HDI)/China

Hexamethylene Diisocyanate (HDI) from China

Hexamethylene diisocyanate (HDI) is an aliphatic diisocyanate with the formula OCNC6H12NCO, classified in HTS 2929.10.80.90 as an 'other' isocyanate per Chapter 29 nitrogen function provisions. It produces flexible, UV-resistant polyurethanes for automotive clearcoats.

Duty Rate — China → United States

19%

Rate breakdown

9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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Import Tips

• Mandatory Hazard Class 6.1 UN 2281 labeling; ensure importer has OSHA-compliant exposure controls

• Test for free NCO content (47-48%) to confirm monomeric HDI vs. biuret/trimer forms

Hexamethylene Diisocyanate (HDI) from China — Import Duty Rate | HTS 2929.10.80.90