2826.90.10.00 - Fluorosilicates of sodium or of potassium

This HTS classification covers specific chemical compounds: fluorosilicates of sodium and fluorosilicates of potassium. These are inorganic salts derived from silicic acid and hydrofluoric acid, specifically where the complex anion is [SiF6]²⁻, combined with sodium (Na⁺) or potassium (K⁺) cations. Examples include sodium fluorosilicate (Na₂SiF₆) and potassium fluorosilicate (K₂SiF₆). These compounds are primarily used in various industrial applications, such as in the manufacture of insecticides, rodenticides, ceramics, and in water fluoridation processes.

At this level, the distinction lies between specific compounds and "other" categories. The sibling category, 2826.90.90, is for fluorosilicates of other metals or cations, or other complex fluorine salts not specifically enumerated elsewhere in the 2826 heading. Therefore, this 2826.90.10.00 code is exclusively for those fluorosilicates where sodium or potassium is the cation.

As this is a leaf node, there are no further subcategories. Classification under this code requires definitive identification of the substance as either sodium fluorosilicate or potassium fluorosilicate. If a product is identified as a fluorosilicate with a different metal cation (e.g., barium fluorosilicate) or another type of complex fluorine salt, it would be classified under the sibling category 2826.90.90.