2849.10.00.00 - Of calcium

This HTS category, 2849.10.00.00, specifically covers carbides of calcium, whether chemically defined or not. Calcium carbide is a compound composed of calcium and carbon. Its primary industrial application is in the production of acetylene gas, which is vital for welding and cutting processes, as well as in the synthesis of various organic chemicals. It may also be used in metallurgy and as a desulfurizing agent.

This classification is distinguished from its sibling categories by its chemical composition. While all fall under the broader heading of carbides, 2849.10.00.00 is exclusively for calcium-based carbides. Sibling categories such as 2849.20.00.00 pertain to silicon carbides, and 2849.90.00.00 encompasses all other carbides not specifically enumerated. Therefore, the key differentiator for this category is the presence of calcium as the metallic element within the carbide compound.

As this is a leaf node in the HTS classification, there are no further subcategories. The classification is specific to calcium carbides, and the tariff treatment is directly applied to goods falling within this precise definition. When classifying, attention should be paid to verifying the chemical composition to ensure it is indeed calcium carbide and not a mixture or a different type of carbide.