2530.20.10.00 - Kieserite

This HTS classification, 2530.20.10.00, specifically covers natural kieserite. Kieserite is a mineral found in evaporite deposits, primarily consisting of hydrated magnesium sulfate (MgSO₄·H₂O). It is a distinct mineral species and is valued for its magnesium and sulfur content, often used directly as a fertilizer or as a raw material in the production of other magnesium sulfate compounds.

Within the broader category of "Kieserite, epsom salts (natural magnesium sulfates)," this subcategory is differentiated from its sibling, 2530.20.20.00 (Epsom salts). While both are natural magnesium sulfates, kieserite is a specific mineral form with a particular chemical composition and crystal structure, whereas "epsom salts" at this level typically refers to naturally occurring magnesium sulfate heptahydrate (MgSO₄·7H₂O) or its processed forms. Classification hinges on the precise mineralogical identification and chemical makeup.

As this is a leaf node within the HTS, there are no further subcategories. Therefore, the focus for classification at this level is on the accurate identification of natural kieserite based on its origin and chemical properties, distinguishing it from other magnesium sulfate minerals or manufactured products. This ensures proper application of trade regulations and tariffs when importing or exporting this specific mineral.