HS Code for Butene
The classification of Butene under HS code 2901.23 is determined by its chemical structure as an acyclic unsaturated hydrocarbon. According to the General Rules of Interpretation (GRI), specifically Rule 1, products are classified based on the terms of the headings and any relative section or chapter notes. Heading 2901 covers acyclic hydrocarbons, and the subheading 2901.23 is specifically reserved for butene (butylene) and its various isomers. These compounds consist of four carbon atoms and eight hydrogen atoms with one double bond. To be classified here, the substance must be a separate chemically defined compound, typically meeting high purity standards. This classification applies regardless of whether the butene is 1-butene, 2-butene, or isobutylene, as the HS nomenclature groups these isomers together under a single code to simplify international trade and monitoring of petrochemical feedstocks.
Products Included
- 1-Butene (alpha-butylene)
- (Z)-But-2-ene (cis-2-butylene)
- (E)-But-2-ene (trans-2-butylene)
- Isobutylene (2-methylpropene)
- Mixed isomers of butene of high purity
Common Misclassification
Butene is frequently misclassified under HS code 2711.14 (Liquefied ethylene) or 2711.19 (Other liquefied petroleum gases). The primary distinction lies in the purity and the intended use. Chapter 27 is generally for mineral fuels and oils, whereas Chapter 29 is for separate chemically defined organic compounds. If the butene is part of a crude mixture of hydrocarbons intended for use as fuel, it belongs in Chapter 27. Another common error is confusing it with 2901.24, which covers buta-1,3-diene and isoprene; these are dienes (two double bonds) rather than mono-alkenes like butene.
FAQ
What is the HS code for Butene?
The HS code for Butene and its isomers is 2901.23, which falls under the category of acyclic unsaturated hydrocarbons.
Are butene isomers classified under different codes?
No, all isomers of butene, including 1-butene and isobutylene, are grouped together under the same HS code 2901.23.
Industry
Frequently Asked Questions
What is the HS code for Butene?
The HS code for Butene is 290123 (Acyclic hydrocarbons; unsaturated, butene (butylene) and isomers thereof).
How do I classify Butene for customs?
Butene is classified under HS code 290123 — Acyclic hydrocarbons; unsaturated, butene (butylene) and isomers thereof. This is a 6-digit subheading level code.
Is the HS code for Butene the same in all countries?
The base HS code 290123 for Butene is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.