HS Code for Butylene

Butylene, also systematically known as butene, represents a group of unsaturated acyclic hydrocarbons. Its classification under HS code 2901.23 is highly precise, as this subheading specifically covers "butene (butylene) and isomers thereof" within the broader category of "Unsaturated acyclic hydrocarbons" (2901.2X). This designation accurately encompasses all structural isomers of butene, including 1-butene, cis-2-butene, trans-2-butene, and isobutylene (2-methylpropene). These compounds are characterized by a four-carbon chain containing one double bond, making them crucial intermediates in the petrochemical industry. Their inclusion in Chapter 29, which is dedicated to organic chemicals, reflects their fundamental role as chemical building blocks and their defined molecular structure.

Products Included

• 1-Butene
• cis-2-Butene
• trans-2-Butene
• Isobutylene (2-methylpropene)
• Butene mixtures containing these isomers

Common Misclassification

Accurate classification of butylene requires careful attention to its chemical structure. HS 2901.10, which covers "Saturated acyclic hydrocarbons" like butane, is a potential source of misclassification if the unsaturated nature (presence of a double bond) of butylene is overlooked. The distinction between saturated and unsaturated hydrocarbons is fundamental within Chapter 29. Furthermore, other unsaturated acyclic hydrocarbons, such as ethylene (HS 2901.21) and propene (propylene) (HS 2901.22), might be confused with butylene. However, these codes are specifically for two-carbon and three-carbon alkenes, respectively. The explicit mention of "butene (butylene) and isomers thereof" in 2901.23 clearly differentiates it based on its four-carbon chain length, ensuring precise classification.

FAQ

What is the HS code for Butylene?

The HS code for Butylene is 2901.23.

What are the main industrial applications of Butylene?

Butylene is primarily used as a monomer in the production of various polymers, including polybutene and butyl rubber, and as an intermediate in the synthesis of other organic chemicals and fuels.