# United States tariff line 2901.24.20.00: Having a purity of 95 percent or more by weight

> In the United States tariff, line 2901.24.20.00 covers unsaturated, buta-1,3-diene and isoprene, isoprene, having a purity of 95 percent or more by weight. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 2901.24 in heading 29.01 (chapter 29).

Source: https://border.bot/countries/united-states/hs-codes/2901242000
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) / [2901.24.20.00](https://border.bot/countries/united-states/hs-codes/2901242000)

## Key facts

- Tariff line: 2901.24.20.00
- Covers: Unsaturated, buta-1,3-diene and isoprene, isoprene, having a purity of 95 percent or more by weight
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [2901.24](https://border.bot/hs-codes/290124)

## What this line covers

In the United States tariff, line 2901.24.20.00 covers unsaturated, buta-1,3-diene and isoprene, isoprene, having a purity of 95 percent or more by weight.

Its legal text is “Having a purity of 95 percent or more by weight”, read under “Unsaturated”, “Buta-1,3-diene and isoprene” and “Isoprene”.

## How it is structured

It falls under HS subheading 2901.24 in heading 29.01 (chapter 29). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 29: Organic chemicals
- Heading 29.01: Acyclic hydrocarbons
- Subheading 2901.24: Unsaturated
- Within the subheading: Buta-1,3-diene and isoprene
- Within the subheading: Isoprene
- Line 2901.24.20.00: Having a purity of 95 percent or more by weight

## Duty

Goods under this line enter free of general (MFN) duty.

## 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)

## Other lines under 2901.24

- [2901.24.10.00](https://border.bot/countries/united-states/hs-codes/2901241000) Buta-1,3-diene
- [2901.24.50.00](https://border.bot/countries/united-states/hs-codes/2901245000) Other

- Previous line: [2901.24.10.00](https://border.bot/countries/united-states/hs-codes/2901241000) Buta-1,3-diene
- Next line: [2901.24.50.00](https://border.bot/countries/united-states/hs-codes/2901245000) Other

## Frequently asked questions

### What does tariff line 2901.24.20.00 cover in the United States tariff?

In the United States tariff, line 2901.24.20.00 covers unsaturated, buta-1,3-diene and isoprene, isoprene, having a purity of 95 percent or more by weight.

### What is the general (MFN) duty on 2901.24.20.00 in the United States?

Goods under this line enter 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/2901242000.json