2835.39 - Other:

This HTS category, 2835.39, encompasses polyphosphates that are not chemically defined by specific chemical names or structures at a more granular level. Polyphosphates are compounds containing multiple phosphate groups linked together. This broad classification includes various forms of polyphosphates, excluding those that are specifically identified, such as sodium triphosphate which is classified under 2835.31.

The distinction between 2835.39 and its sibling category, 2835.31, lies in specificity. While 2835.31 precisely identifies sodium triphosphate, 2835.39 is for other polyphosphates that do not meet this exact chemical definition. This means that any polyphosphate, when not explicitly named or defined elsewhere, would fall under the broader umbrella of 2835.39.

Within this category, further subdivisions are provided to allow for more precise classification. Subcategory 2835.39.10.00 specifically covers polyphosphates of potassium. The remaining polyphosphates, not of potassium and not otherwise specifically classified, are grouped under 2835.39.50.00 as "Other." This hierarchical structure allows for accurate tariff assessment based on the elemental composition and specific chemical identity of the polyphosphate in question.