9613.80.10.40 - Butane

This category specifically classifies butane when it is intended for use as fuel in lighters. While butane is a chemical compound with various industrial applications, its inclusion under HTS code 9613.80.10.40 is solely for butane that functions as the fuel source for cigarette lighters and other similar igniting devices. The classification is driven by the specific end-use and presentation of the butane, distinguishing it from bulk industrial chemicals.

This particular classification is distinct from its sibling category, 9613.80.10.80, which covers "Other" lighters. While 9613.80.10.40 is for the fuel itself in the context of lighters, the "Other" category would encompass a broader range of lighter types not specifically detailed elsewhere within heading 9613, such as novelty lighters, windproof lighters, or electronic lighters that may use different ignition mechanisms.

As this is a leaf node, there are no further subcategories under 9613.80.10.40. Therefore, the focus remains on the precise identification of butane destined for lighter fuel. Classification here relies on verifying the product's identity as butane and its intended purpose as fuel for igniting devices, ensuring accurate customs declarations for these specific goods.