United States tariff line 2901.23.00.00: Butene (Butylene) and isomers thereof
Last updated
Key facts
- Tariff line
- 2901.23.00.00
- Covers
- Unsaturated, butene (Butylene) and isomers thereof
- Duty (MFN)
- Free
- Additional duties
- None recorded
- Restrictions
- None recorded
- Tariff
- United States
- HS subheading
- 2901.23
Summary
In the United States tariff, line 2901.23.00.00 covers unsaturated, butene (Butylene) and isomers thereof. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 2901.23 in heading 29.01 (chapter 29).
What this line covers
In the United States tariff, line 2901.23.00.00 covers unsaturated, butene (Butylene) and isomers thereof.
Its legal text is “Butene (Butylene) and isomers thereof”, read under “Unsaturated”.
How it is structured
It falls under HS subheading 2901.23 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 2901.23
- Unsaturated
- Line 2901.23.00.00
- Butene (Butylene) and isomers thereof
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 2901.23 yet.
Frequently asked questions
What does tariff line 2901.23.00.00 cover in the United States tariff?
In the United States tariff, line 2901.23.00.00 covers unsaturated, butene (Butylene) and isomers thereof.
What is the general (MFN) duty on 2901.23.00.00 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: