2841.80.00.50 - Other

This HTS category, 2841.80.00.50, encompasses "Other" tungstates (wolframates) that do not fall under the specifically listed categories for ammonium or calcium tungstates. Tungstates are salts or esters of tungstic acid, which is an oxoacid of tungsten. In this context, the classification pertains to inorganic compounds where tungsten is present in its oxoanionic form, combined with a cation other than ammonium or calcium. These substances typically present as solid powders or crystalline materials.

The primary distinction of this subcategory lies in the exclusion of ammonium and calcium tungstates, which are classified under 2841.80.00.10 and 2841.80.00.20, respectively. Therefore, goods classified here will involve tungstates combined with metallic cations (e.g., sodium, potassium, barium) or other non-metallic cations not already specified. The classification hinges on the chemical composition and the specific cation present in the tungstate salt.

As this is a leaf node in the HTS classification, there are no further subdivisions. Classification under this code will depend on confirming that the imported substance is indeed a tungstate (a salt or ester of tungstic acid) and that its cation is not ammonium or calcium. Examples of goods that might fall under this classification include sodium tungstate, often used as a corrosion inhibitor and in the production of pigments, or potassium tungstate, utilized in various chemical processes.