7901.12 - Containing by weight less than 99.99 percent of zinc:

This HTS category, 7901.12, encompasses unwrought zinc that is not alloyed but contains by weight less than 99.99 percent of zinc. This classification focuses on zinc in its primary, unworked forms, such as ingots, pigs, or cakes, which are intended for further processing. The defining characteristic is the purity level, distinguishing it from highly refined zinc.

It is important to differentiate this category from its sibling, 7901.11.00.00, which specifically covers unwrought zinc containing by weight 99.99 percent or more of zinc. Therefore, 7901.12 applies to zinc with a slightly lower purity, making it suitable for a wider range of industrial applications where absolute maximum purity is not a critical requirement.

The subcategories within 7901.12 further refine the classification based on intended use and specific characteristics. The primary subdivision is between "Casting-grade zinc" (7901.12.10.00), designed for die-casting and other casting processes, and "Other" (7901.12.50.00), which includes any remaining unwrought, unalloyed zinc with less than 99.99 percent purity not specifically designated for casting. This differentiation allows for accurate tariff application based on the functional properties of the zinc.