United States tariff line 3909.31.00.00: Poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI)
Last updated
Key facts
- Tariff line
- 3909.31.00.00
- Covers
- Other amino-resins, poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI)
- Duty (MFN)
- 6.5%
- Preferential rates
- From free (17 programmes or origins)
- Additional duties
- None recorded
- Restrictions
- None recorded
- Tariff
- United States
- HS subheading
- 3909.31
Summary
In the United States tariff, line 3909.31.00.00 covers other amino-resins, poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI). The general (MFN) duty rate is 6.5%. It falls under HS subheading 3909.31 in heading 39.09 (chapter 39).
What this line covers
In the United States tariff, line 3909.31.00.00 covers other amino-resins, poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI).
Its legal text is “Poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI)”, read under “Other amino-resins”.
How it is structured
It falls under HS subheading 3909.31 in heading 39.09 (chapter 39). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.
- Chapter 39
- Plastics and articles thereof
- Heading 39.09
- Amino-resins, phenolic resins and polyurethanes, in primary forms
- Subheading 3909.31
- Other amino-resins
- Line 3909.31.00.00
- Poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI)
Duty
The general (MFN) duty rate is 6.5%.
Duty-free entry applies to goods that qualify under 16 programmes, and to goods from a group of origins (origin group A).
| Preferential rate | Programme or origin |
|---|---|
| Free | a group of origins (origin group A) (A) |
| Free | United States-Australia Free Trade Agreement (AU) |
| Free | United States-Bahrain Free Trade Agreement Implementation Act (BH) |
| Free | United States-Chile Free Trade Agreement (CL) |
| Free | United States-Colombia Trade Promotion Agreement Implementation Act (CO) |
| Free | African Growth and Opportunity Act (D) |
| Free | Caribbean Basin Economic Recovery Act (E) |
| Free | United States-Israel Free Trade Area (IL) |
| Free | United States-Jordan Free Trade Area Implementation Act (JO) |
| Free | United States-Korea Free Trade Agreement Implementation Act (KR) |
| Free | United States-Morocco Free Trade Agreement Implementation Act (MA) |
| Free | United States-Oman Free Trade Agreement Implementation Act (OM) |
| Free | Dominican Republic-Central America-United States Free Trade Agreement (P) |
| Free | United States-Panama Trade Promotion Agreement Implementation Act (PA) |
| Free | United States-Peru Trade Promotion Agreement Implementation Act (PE) |
| Free | United States-Mexico-Canada Agreement (S) |
| Free | United States-Singapore Free Trade Agreement (SG) |
In other countries
No other national tariff on border.bot has live lines under 3909.31 yet.
Frequently asked questions
What does tariff line 3909.31.00.00 cover in the United States tariff?
In the United States tariff, line 3909.31.00.00 covers other amino-resins, poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI).
What is the general (MFN) duty on 3909.31.00.00 in the United States?
The general (MFN) duty rate is 6.5%.
Which preferential rates apply to 3909.31.00.00?
Duty-free entry applies to goods that qualify under 16 programmes: the United States-Australia Free Trade Agreement, the United States-Bahrain Free Trade Agreement Implementation Act, the United States-Chile Free Trade Agreement, the United States-Colombia Trade Promotion Agreement Implementation Act, African Growth and Opportunity Act, Caribbean Basin Economic Recovery Act, the United States-Israel Free Trade Area, the United States-Jordan Free Trade Area Implementation Act, the United States-Korea Free Trade Agreement Implementation Act, the United States-Morocco Free Trade Agreement Implementation Act, the United States-Oman Free Trade Agreement Implementation Act, the Dominican Republic-Central America-United States Free Trade Agreement, the United States-Panama Trade Promotion Agreement Implementation Act, the United States-Peru Trade Promotion Agreement Implementation Act, the United States-Mexico-Canada Agreement and the United States-Singapore Free Trade Agreement, and to goods from a group of origins (origin group A).
Sources and updates
The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
This page was last updated on 9 October 2026.
Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.
Official source files: