2833.29.51 - Other

This classification, HTS Code 2833.29.51, encompasses "other sulfates" that do not fall under the more specific subheadings for cobalt, iron, vanadium, chromium, or zinc sulfates. Essentially, it serves as a residual category for inorganic sulfates of various metals not explicitly listed in preceding categories within the 2833.29 subheading. These would include sulfates of metals such as magnesium, aluminum (when not classified as alums), sodium, potassium, or any other metal not specifically enumerated. The primary classification criterion here is the chemical composition, specifically the presence of a sulfate anion ([SO4]²⁻) combined with a metallic cation.

Unlike its sibling categories, which precisely denote sulfates of cobalt (2833.29.10.00), iron (2833.29.20.00), vanadium (2833.29.30.00), chromium (2833.29.40.00), and zinc (2833.29.45.00), this category is defined by exclusion. If a sulfate is not of one of these specified metals, it will likely find its place here. Therefore, determining classification for goods within this code requires careful examination of the metallic element present in the sulfate compound.

The "Other" description at this level necessitates further breakdown, and this subheading is further divided into subcategories to allow for more granular classification. The primary distinction within this category is between sulfates of manganese and all other remaining sulfates not already classified. HTS Code 2833.29.51.10 is dedicated to sulfates of manganese, while HTS Code 2833.29.51.90 serves as the ultimate residual for all other metallic sulfates not specified elsewhere in the 2833.29 series.