# United States tariff line 3902.90.00.10: Polybutylene

> In the United States tariff, line 3902.90.00.10 covers polybutylene. The general (MFN) duty rate is 6.5%. It falls under HS subheading 3902.90 in heading 39.02 (chapter 39).

Source: https://border.bot/countries/united-states/hs-codes/3902900010
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 39](https://border.bot/countries/united-states/hs-codes/39) / [3902.90](https://border.bot/countries/united-states/hs-codes/390290) / [3902.90.00.10](https://border.bot/countries/united-states/hs-codes/3902900010)

## Key facts

- Tariff line: 3902.90.00.10
- Covers: Polybutylene
- Duty (MFN): 6.5%
- Preferential rates: From free (17 programmes or origins)
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [3902.90](https://border.bot/hs-codes/390290)

## What this line covers

In the United States tariff, line 3902.90.00.10 covers polybutylene.

Its legal text is “Polybutylene”, read under “Other”.

Products commonly classified here include C12-C18 alkenes, polymers with 4-methyl-1-pentene (CAS Nos. 25155-83-3, 81229-87-0 and 103908-22-1), alpha-Alkenes (C20 -C24) maleic anhydride-4-amino-2,2,6,6-tetramethylpiperidine, polymer (CAS No. 152261-33-1) and Oligomeric poly(butadiene) (CAS No. 68441-52-1) (border.bot’s search keywords, not legal text).

## How it is structured

It falls under HS subheading 3902.90 in heading 39.02 (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 39.02: Polymers of propylene or of other olefins, in primary forms
- Subheading 3902.90: Other
- Line 3902.90.00.10: Polybutylene

## Duty

The general (MFN) duty rate is 6.5%.

The rate is published on 3902.90.00.

Duty-free entry applies to goods that qualify under 16 programmes, and to goods from a group of origins (origin group A*).

- 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 3902.90 yet.

- [The Harmonized System text for 3902.90](https://border.bot/hs-codes/390290)

## Other lines under 3902.90

- [3902.90.00.50](https://border.bot/countries/united-states/hs-codes/3902900050) Other

- Previous line: [3902.30.00.00](https://border.bot/countries/united-states/hs-codes/3902300000) Propylene copolymers
- Next line: [3902.90.00.50](https://border.bot/countries/united-states/hs-codes/3902900050) Other

## Frequently asked questions

### What does tariff line 3902.90.00.10 cover in the United States tariff?

In the United States tariff, line 3902.90.00.10 covers polybutylene.

### What is the general (MFN) duty on 3902.90.00.10 in the United States?

The general (MFN) duty rate is 6.5%. The rate is published on 3902.90.00.

### Which preferential rates apply to 3902.90.00.10?

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:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/3902900010.json