2804.10.00.00 - Hydrogen

The HTS code 2804.10.00.00 specifically classifies Hydrogen, a colorless, odorless, and highly flammable gas. As the lightest and most abundant chemical element, hydrogen in its elemental form is distinct from other nonmetals and rare gases found within Chapter 28. Its primary classification is based on its elemental nature, distinguishing it from compounds or mixtures where it might be a component.

This category is differentiated from its siblings by the specific element it represents. For instance, while other siblings under the broader heading "Hydrogen, rare gases and other nonmetals" cover elements like Nitrogen (2804.30.00.00) and Oxygen (2804.40.00.00), this code is exclusively for elemental Hydrogen. Similarly, it is distinct from categories covering Boron, Tellurium, and Silicon, which are also listed as sibling nonmetals.

As this HTS code is a leaf node, there are no further subcategories. Classification under 2804.10.00.00 is therefore determined by the identification of the substance as elemental Hydrogen, typically in gaseous form, whether compressed, liquefied, or solidified, but not as part of a compound or mixture unless specifically provided for elsewhere. The purity and intended industrial or scientific use are generally not primary classification criteria for this elemental classification.