2826.90 - Other:

HTS code 2826.90 encompasses "Other" complex fluorine salts that do not fall under the specific subheadings within heading 2826. This category is distinct from its sibling, 2826.30.00.00, which specifically enumerates sodium hexafluoroaluminate (synthetic cryolite). Therefore, 2826.90 is intended for a broader range of complex fluorine compounds.

Within this "Other" classification, further distinctions are made to provide more granular detail. The subcategory 2826.90.10.00 specifically addresses fluorosilicates of sodium or potassium. This highlights the importance of identifying both the specific metallic cation and the complex fluorine anion when classifying these inorganic compounds.

The remaining goods classified under 2826.90.90 are then designated as "Other." This residual category serves to capture any remaining complex fluorine salts that do not fit the specific definitions of either sodium hexafluoroaluminate or the sodium and potassium fluorosilicates. Proper identification of chemical composition and structure is crucial for accurately assigning these products to their correct HTS subheadings.