2711.29.00.20 - Butanes with a purity of 90 liquid volume percent or more, but less than 95 liquid volume percent

This HTS classification covers butanes that meet a specific purity threshold, ranging from 90% to less than 95% liquid volume percent. These are gaseous hydrocarbons, specifically butanes, when presented in a liquid state for storage and transport. The classification falls under the broader category of petroleum gases and other gaseous hydrocarbons, further refined to "in gaseous state" and then "other" types of butanes.

The key differentiator for this specific code is the purity of the butane. While it is part of the broader butane category, it is distinguished from other classifications by its defined purity range. For instance, sibling categories at this level might cover butanes with higher or lower purity levels, or other mixed hydrocarbon gases falling under the "other" subheadings.

As this is a leaf node within the HTS structure, there are no further subcategories. Therefore, the focus is on the precise definition of "butanes with a purity of 90 liquid volume percent or more, but less than 95 liquid volume percent." This implies that any butane mixture falling precisely within this purity bracket, regardless of its specific end-use, will be classified here. It is crucial for importers and exporters to accurately determine and declare the liquid volume percent purity of their butane shipments to ensure correct classification and avoid potential customs issues.