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HS Code for 2-butene
Author: Ivy Tse
Published:
Updated:

HS Code for 2-Butene 2025 Guide

TL;DR: The **HS code for 2-butene is 2901.23** in 2025 (Chapter 29, acyclic hydrocarbons). No WCO changes until 2027, but watch regional updates like GCC 12-digit codes and US HTS rules. Use this guide for accurate classification, tariff compliance, and hazmat shipping in petrochemical trade.

What is the HS Code for 2-Butene in 2025?

The **HS code for 2-butene remains 2901.23** for global trade classification.

  • Chapter 29: Organic chemicals
  • Heading 2901: Acyclic hydrocarbons
  • Subheading 2901.23: Butene (butylene) and isomers thereof

This covers cis-2-butene and trans-2-butene. Valid per WCO HS Nomenclature 2022, stable through 2027.

Essential for **tariff classification** and **customs compliance** in 2025 shipments.

2025 Regional HS Code Changes for 2-Butene

**National updates in 2025 affect HS code application** despite WCO stability.

Region2025 HS ChangeImpact on 2901.23 (2-Butene)
USAHTS mandatory for USPS (Sep 1)10-digit codes required post-de minimis changes
GCC Countries12-digit HS shift (Jan 1)Added digits for precise hydrocarbon tariffs
EUCombined Nomenclature updatesRefinements in chemical subheadings
ChinaCustoms tariff adjustmentsEnhanced tracking for petrochemicals
AustraliaHS alignment tweaksFocus on hazmat chemicals

Table shows key **HS code changes 2025**—2-butene code steady, but extensions vary.

How the HS Code System Works for Chemicals

**HS codes standardize over 5,000 commodity groups worldwide.**

  • First 6 digits: Harmonized (WCO)
  • Additional digits: National tariffs
  • Used for duties, quotas, statistics
  • Critical for **HS nomenclature 2025** compliance

Chapter 29 covers organic chemicals like **2-butene HS code 2901.23**.

Industrial Applications of 2-Butene

**2-Butene (C4H8) is a vital petrochemical building block.**

  • Gasoline additives for higher octane
  • Feedstock for synthetic rubber
  • Production of polymers and plastics
  • Intermediate in chemical synthesis
  • 2025 trend: EV battery material precursors

Demand rises with green energy shifts.

Step-by-Step: How to Find HS Code for 2-Butene

**Use this 2025 how-to guide for accurate **tariff classification** of 2-butene.**

  1. Identify the product: Verify C4H8 isomer (cis/trans-2-butene).
  2. Navigate to Chapter 29: Organic chemicals.
  3. Select 2901: Acyclic hydrocarbons.
  4. Choose 2901.23: Butene and isomers.
  5. Append national digits and document with SDS.

Pro tip: Cross-check with official databases annually.

Common Misclassifications of 2-Butene HS Code

**Errors in HS code for 2-butene lead to delays and fines.**

  • Confusing with 1-butene (2901.22)
  • Ignoring isomer specifics
  • Missing regional extensions
  • Overlooking purity levels

Always reference **HS nomenclature 2025** updates.

Hazmat Shipping Rules for 2-Butene (UN 1012)

**2-Butene is a flammable gas requiring special handling.**

  • UN Number: 1012, Class 2.1
  • IATA/IMDG packing instructions
  • Dangerous goods declaration
  • Approved cylinders/valves

Link **HS code 2901.23** with hazmat docs for clearance.

FAQ: HS Code for 2-Butene Questions

Answers to top **People Also Ask** queries on **2-butene HS code**.

What is the exact HS code for 2-butene?
2901.23 under Chapter 29 for acyclic hydrocarbons including isomers.
Does the 2-butene HS code change in 2025?
No WCO change; regional extensions like GCC 12-digits apply.
What is the US HTS code for 2-butene?
2901.23.XXXX (10 digits based on specifics).
Is 2-butene hazardous for shipping?
Yes, UN 1012 Class 2.1 flammable gas.
How do I classify cis-2-butene?
Same as 2901.23; isomers grouped together.
What chapter is 2-butene in HS nomenclature?
Chapter 29: Organic chemicals.
Any 2025 tariff changes for 2901.23?
Regional only—no global shift until 2027.
Where to verify 2-butene HS code?
WCO database or national customs portals.
Does purity affect 2-butene HS code?
Typically no; 2901.23 covers commercial grades.
What's the EU CN code for 2-butene?
2901.23.00 with possible 8-digit refinements.

Resources for HS Code Compliance

For **customs compliance** in 2025 petrochemical shipping, consider tools like FreightAmigo.

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