2840.19.00.00 - Other

This HTS classification covers refined borax that is not anhydrous. Specifically, it includes disodium tetraborate in hydrated forms, meaning it contains water molecules within its crystal structure. These are typically crystalline solids, often appearing as white or colorless powders or lumps, and are commercially known by various names such as borax decahydrate or borax pentahydrate, depending on the degree of hydration.

The key distinction for this category lies in the presence of water. It differentiates itself from its sibling category, 2840.11.00.00, which is exclusively for anhydrous disodium tetraborate. While both are forms of refined borax, the presence or absence of chemically bound water is the decisive factor for classification.

As this is a leaf node, there are no further subdivisions under this specific HTS code. Therefore, classification into 2840.19.00.00 is solely determined by identifying disodium tetraborate that is hydrated. Importers and exporters should verify the chemical composition and the presence of hydration water through product specifications or laboratory analysis to ensure accurate classification.