2821.10.00 - Iron oxides and hydroxides

This HTS category, 2821.10.00, encompasses natural and synthetic iron oxides and hydroxides. These compounds are primarily characterized by their iron content and are often utilized for their coloring properties. Examples include ferric oxide (hematite), ferrous oxide (magnetite), and ferric hydroxide. While these substances may be used as pigments, this specific classification is for the raw iron oxides and hydroxides themselves, rather than their formulated pigment applications.

It is important to distinguish this category from its sibling, 2821.20.00, which covers "earth colors." While earth colors often contain iron oxides and hydroxides, they are defined by a specific threshold: containing 70 percent or more by weight of combined iron, calculated as Fe2O3. Category 2821.10.00.00 is broader and includes iron oxides and hydroxides that may not meet this specific iron content requirement or are not presented in the form of "earth colors."

Within this category, subcategories exist to further refine the classification. The primary subdivision is for "Synthetic pigments," acknowledging manufactured iron oxides and hydroxides produced for specific coloring purposes. The remaining entries fall under "Other," which would encompass natural iron oxides and hydroxides not classified as earth colors, as well as synthetic forms not specifically designated as pigments in this subheading.