HS Code for Butane

Butane is classified under HS code 2901.10 when it is presented as a separate chemically defined organic compound. Heading 2901 covers acyclic hydrocarbons, and subheading 2901.10 specifically addresses saturated acyclic hydrocarbons (alkanes). For a product to be classified here, it must meet high purity standards, typically exceeding 95% by volume, as defined in the Chapter 29 notes. This classification includes both n-butane and isobutane (2-methylpropane). The distinction is critical because butane is also a major component of liquefied petroleum gas (LPG), but when it is refined to a high degree of purity for use as a chemical feedstock or laboratory reagent, it moves from the mineral fuels of Chapter 27 to the organic chemicals of Chapter 29. The molecular formula C4H10 defines this substance, and its saturated nature (single bonds only) dictates its placement in the 2901.10 category.

Products Included

• Pure n-Butane (95% or higher purity)
• Pure Isobutane
• Chemically defined butane for laboratory use
• Saturated acyclic hydrocarbons with four carbon atoms

Common Misclassification

Butane is most commonly misclassified under 2711.13. HS code 2711.13 is intended for liquefied butane that is used as fuel or is of lower purity (commercial grade). If the butane is part of a mixture of liquefied petroleum gases, it belongs in 2711.19. Another common error is 3606.10, which is reserved for butane specifically packaged in small containers (under 300 cm3) for refilling lighters. Classification in Chapter 29 requires the substance to be a separate chemically defined compound, not a crude fuel mixture.

FAQ

What is the HS code for Butane?

For high-purity, chemically defined butane, the HS code is 2901.10. For fuel-grade butane, it is 2711.13.

Is isobutane classified under the same code?

Yes, isobutane is an isomer of butane and is classified as a saturated acyclic hydrocarbon under 2901.10.