2834.21.00.00 - Of potassium

This HTS category, 2834.21.00.00, specifically covers nitrates of potassium. These are inorganic chemical compounds characterized by the presence of the potassium cation (K+) and the nitrate anion (NO3-). Examples include potassium nitrate (KNO3), which is widely used as a fertilizer, in pyrotechnics, and as a food preservative. The classification hinges on the presence of potassium as the dominant cation in the nitrate compound.

Distinguishing this category from its sibling, 2834.29 (Other nitrates), is crucial. While 2834.29 encompasses nitrates of metals or other cations not specifically listed elsewhere in heading 2834, this subcategory is exclusively for those nitrates where potassium is the principal metallic element. Therefore, any nitrate compound not containing potassium would fall under the "Other" category.

As this is a leaf node, there are no further subcategories to introduce. The classification is definitive for potassium nitrates. To accurately classify an import or export, one must verify that the nitrate compound in question contains potassium. If it does, it falls within this specific HTS code.