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HTS code reference›Chapter 39: Plastics and articles thereof›3909.31.00.00
US HTS · 2026 REVISION 12

HTS Code 3909.31.00.00

Poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI)

Official tariff path

Amino-resins, phenolic resins and polyurethanes, in primary forms: › Other amino-resins: › Poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI)

Level: statistical10General duty: 6.5%Unit: kg
WHAT THIS PAGE ADDSRead the code in context

Official wording plus the product examples, decision checks and next steps that a raw tariff lookup does not provide.

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Does HTS 3909.31.00.00 fit your product?

This is the fastest way to use the page: compare the exact commercial description with the legal wording, then check the closest child or sibling provision. A valid code is not automatically the right code for every product in the same category.

  • The product must match the tariff wording: Poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI).
  • This page is a reporting provision; verify the complete product description and chapter notes before filing.
  • The displayed duty is 6.5%; origin programs, trade remedies, quotas and taxes may change the final amount.

What does HTS 3909.31.00.00 cover?

This provision appears in the 2026 Harmonized Tariff Schedule of the United States under the following legal tariff hierarchy.

  1. 1Amino-resins, phenolic resins and polyurethanes, in primary forms:
  2. 2Other amino-resins:
  3. 3Poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI)

Nearby tariff provisions

These are the alternatives worth comparing when one product fact changes.

3909.10.00.00Urea resins; thiourea resins3909.20.00.00Melamine resins3909.39.00.00Other3909.40.00.00Phenolic resins3909.50Polyurethanes:
Official source and limitations

Based on USITC HTS 2026 Revision 12, published July 21, 2026. The general rate does not include every origin-specific program, Section 301 or 232 measure, antidumping or countervailing duty, quota, or other agency requirement.

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