# United States tariff lines under HS 2901.24

> The United States tariff splits HS 2901.24 (unsaturated: Buta-1,3-diene and isoprene) into 3 national lines: 2901.24.10.00 (buta-1,3-diene), 2901.24.20.00 (having a purity of 95 percent or more by weight) and 2901.24.50.00 (other). Every United States line under 2901.24 is free of general (MFN) duty.

Source: https://border.bot/countries/united-states/hs-codes/290124
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 29](https://border.bot/countries/united-states/hs-codes/29) / [2901.24](https://border.bot/countries/united-states/hs-codes/290124)

## Key facts

- HS subheading: [2901.24](https://border.bot/hs-codes/290124)
- Duty (MFN): Free
- National lines: 3
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 29: Organic chemicals

## United States lines under 2901.24

The United States tariff splits HS 2901.24 (unsaturated: Buta-1,3-diene and isoprene) into 3 national lines: 2901.24.10.00 (buta-1,3-diene), 2901.24.20.00 (having a purity of 95 percent or more by weight) and 2901.24.50.00 (other).

Every United States line under 2901.24 is free of general (MFN) duty.

- [2901.24.10.00](https://border.bot/countries/united-states/hs-codes/2901241000) Unsaturated, Buta-1,3-diene and isoprene, Buta-1,3-diene. Duty (MFN): free
- [2901.24.20.00](https://border.bot/countries/united-states/hs-codes/2901242000) Unsaturated, Buta-1,3-diene and isoprene, Isoprene, Having a purity of 95 percent or more by weight. Duty (MFN): free
- [2901.24.50.00](https://border.bot/countries/united-states/hs-codes/2901245000) Unsaturated, Buta-1,3-diene and isoprene, Isoprene, Other. Duty (MFN): free

## In other countries

No other national tariff on border.bot has live lines under 2901.24 yet.

- [The Harmonized System text for 2901.24](https://border.bot/hs-codes/290124)

- Previous subheading: [2901.23](https://border.bot/countries/united-states/hs-codes/290123) Acyclic hydrocarbons
- Next subheading: [2901.29](https://border.bot/countries/united-states/hs-codes/290129) Other

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 2901.24?

The United States tariff splits HS 2901.24 (unsaturated: Buta-1,3-diene and isoprene) into 3 national lines: 2901.24.10.00 (buta-1,3-diene), 2901.24.20.00 (having a purity of 95 percent or more by weight) and 2901.24.50.00 (other).

### What is the duty on HS 2901.24 in the United States?

Every United States line under 2901.24 is free of general (MFN) duty.

## 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/290124.json