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.
| Region | 2025 HS Change | Impact on 2901.23 (2-Butene) |
|---|
| USA | HTS mandatory for USPS (Sep 1) | 10-digit codes required post-de minimis changes |
| GCC Countries | 12-digit HS shift (Jan 1) | Added digits for precise hydrocarbon tariffs |
| EU | Combined Nomenclature updates | Refinements in chemical subheadings |
| China | Customs tariff adjustments | Enhanced tracking for petrochemicals |
| Australia | HS alignment tweaks | Focus 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.**
- Identify the product: Verify C4H8 isomer (cis/trans-2-butene).
- Navigate to Chapter 29: Organic chemicals.
- Select 2901: Acyclic hydrocarbons.
- Choose 2901.23: Butene and isomers.
- 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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