2825.90.30.00 - Tungsten oxides

This HTS category, 2825.90.30.00, specifically covers tungsten oxides. Tungsten oxides are inorganic chemical compounds containing tungsten and oxygen. These compounds can exist in various oxidation states of tungsten, such as tungsten trioxide (WO₃) or tungsten dioxide (WO₂), and are characterized by their metallic sheen and high density. They find applications as pigments, catalysts, and in the production of tungsten metal and alloys.

It is important to distinguish tungsten oxides from other metal oxides listed at the same level. For instance, 2825.90.10.00 covers beryllium oxide and hydroxide, while 2825.90.20.00 pertains to tin oxides. Similarly, this category differs from 2825.90.15.00 (niobium oxide) and 2825.90.75.00 (cadmium oxide) by its specific elemental composition. The residual category, 2825.90.90.00, is reserved for any other metal oxides, hydroxides, and peroxides not specifically enumerated elsewhere within heading 2825.

As a leaf node, 2825.90.30.00 does not have further subdivisions. Therefore, classification within this code relies on accurately identifying the material as an oxide of tungsten. If a product is a compound of tungsten with other elements besides oxygen, or if it is tungsten metal or alloy in its elemental form, it would be classified elsewhere. The primary distinguishing factor for this code is the presence of tungsten in an oxidized state.