2841.50 - Other chromates and dichromates; peroxochromates:

This HTS category, 2841.50, encompasses "Other chromates and dichromates; peroxochromates." It specifically includes inorganic compounds where chromium is in its higher oxidation states (VI), forming salts with oxygen-containing acids. This covers a range of chromate and dichromate salts beyond those specifically listed, as well as peroxochromates, which contain the peroxy group (-O-O-). These substances are typically produced through chemical synthesis and are often characterized by their vibrant colors and strong oxidizing properties.

To distinguish this category from its siblings, it's important to note the focus on chromium. While 2841.30.00.00 specifically names sodium dichromate, and 2841.70 covers molybdates and 2841.80.00 covers tungstates, this category serves as a residual for chromates and dichromates not otherwise enumerated. Similarly, it differs from the manganites, manganates, and permanganates group (under 2841.60, implied by the sibling list structure) which involve manganese in higher oxidation states.

The subcategories within 2841.50 further refine the classification. 2841.50.10.00 specifically identifies potassium dichromate, a common industrial chemical. The residual category, 2841.50.91.00, is designated for all other chromates, dichromates, and peroxochromates not explicitly listed, ensuring a comprehensive classification for these chromium compounds within the broader scope of inorganic salts of oxometallic or peroxometallic acids.