2811.21.00.00 - Carbon dioxide

This HTS classification, 2811.21.00.00, specifically covers carbon dioxide. Carbon dioxide is an inorganic chemical compound composed of one carbon atom and two oxygen atoms. It is a colorless, odorless gas under standard conditions, often encountered in its solid form as dry ice. This classification is for pure carbon dioxide or mixtures where carbon dioxide is the primary component, regardless of its physical state (gaseous, liquid, or solid) as presented for importation.

Within the broader category of "Other inorganic oxygen compounds of nonmetals," this subheading distinguishes itself from its siblings. For instance, 2811.22 covers silicon dioxide, a fundamentally different compound with distinct chemical properties and applications. The sibling category 2811.29 encompasses "Other" inorganic oxygen compounds of nonmetals not specifically enumerated elsewhere, making 2811.21 the designated place for carbon dioxide.

As a leaf node, this classification has no further subcategories. Therefore, the focus for classification purposes is on confirming the identity of the imported substance as carbon dioxide. This typically involves examining import documentation, product specifications, and potentially laboratory analysis if there is any doubt about the composition. The tariff ensures that pure or predominantly carbon dioxide products are correctly accounted for under this specific heading.