2827.60 - Iodides and iodide oxides:

This category, 2827.60, encompasses various metallic iodides and iodide oxides. These are inorganic chemical compounds where iodine is combined with a metal, either in its iodide form or as an oxide of iodide. Examples include metal iodides such as potassium iodide, sodium iodide, and calcium iodide, as well as compounds where an iodide radical is bonded with an oxide of a metal. These substances find applications in various industries, including photography, pharmaceuticals, and as chemical reagents.

Distinguishing 2827.60 from its sibling categories is crucial for accurate classification. While all fall under "Chlorides, chloride oxides and chloride hydroxides; bromides and bromide oxides; iodides and iodide oxides," this specific heading focuses exclusively on iodides and iodide oxides. It differentiates from categories like 2827.10 (Ammonium chloride), 2827.20 (Calcium chloride), and other chloride-based entries by the presence of iodine as the defining halogen and its combination with metallic elements. Similarly, it is distinct from bromides and bromide oxides, which contain bromine instead of iodine.

The subcategories within 2827.60 provide further specificity based on the metallic element present in the iodide or iodide oxide. For instance, 2827.60.10.00 details iodides and iodide oxides of calcium or copper, often characterized by their specific chemical formulas and properties. 2827.60.20.00 isolates those composed with potassium, which might have distinct solubility or reactivity patterns. The residual category, 2827.60.51.00, covers all other metallic iodides and iodide oxides not specifically enumerated in the preceding subheadings, requiring careful review of their chemical composition for correct placement.