2827.59.25.00 - Of ammonium, of calcium or of zinc

This HTS category, 2827.59.25.00, specifically classifies bromides and bromide oxides that are *of ammonium, of calcium, or of zinc*. These are inorganic chemical compounds containing bromine in a salt form with ammonium, calcium, or zinc cations. Examples include ammonium bromide (NH₄Br), calcium bromide (CaBr₂), and zinc bromide (ZnBr₂), as well as their corresponding oxide forms where applicable. These compounds find use in various industrial applications, such as flame retardants, photographic materials, and drilling fluids.

Distinguishing this subcategory from its sibling, 2827.59.51.00, is crucial for accurate classification. While both fall under "Other" bromides and bromide oxides, this specific code is exclusively for those compounds where the cation is either ammonium, calcium, or zinc. The sibling category would encompass bromides and bromide oxides with other metallic or non-metallic cations not specifically listed elsewhere within the 2827.59 heading.

As this node is a leaf node, there are no further subcategories. Therefore, the classification relies on the explicit identification of the cation as being ammonium, calcium, or zinc to fall within this precise HTS code. If a bromide or bromide oxide contains a different cation, it would need to be assessed against other applicable headings or subheadings within Chapter 28.