3815.11.00.00 - With nickel or nickel compounds as the active substance

This HTS category, 3815.11.00.00, encompasses supported catalysts where the active catalytic substance is specifically nickel or a nickel compound. These catalysts are designed to facilitate or accelerate chemical reactions without being consumed in the process. They are typically used in a wide range of industrial applications, including petroleum refining, petrochemical production, and the synthesis of various organic chemicals. The "supported" aspect signifies that the active nickel or nickel compound is dispersed on an inert carrier material, such as alumina, silica, or carbon, to enhance surface area and stability.

It is crucial to distinguish this category from its siblings. HTS 3815.12.00.00 covers supported catalysts whose active substance is based on precious metals or their compounds, such as platinum, palladium, or rhodium. HTS 3815.19.00.00, conversely, is a residual category for other supported catalysts not classifiable under the nickel or precious metal headings. Therefore, classification hinges on the precise identification of the active catalytic element.

As a leaf node, HTS 3815.11.00.00 does not have further subdivisions. Classification within this code is determined by the presence of nickel or nickel compounds as the primary active ingredient on a support. This includes materials such as Raney nickel catalysts, nickel on alumina, or nickel supported on silica, provided their function is catalytic and they are not specifically provided for elsewhere in the tariff schedule.