2833.40.60.20 - Of ammonium

This classification covers peroxosulfates where the cation is ammonium. Peroxosulfates, also known as persulfates, are salts containing the peroxodisulfate anion (S₂O₈²⁻). When combined with ammonium ions (NH₄⁺), these compounds exhibit strong oxidizing properties and are utilized in various industrial applications, including polymerization initiators, bleaching agents, and etching solutions.

Within the broader category of "Peroxosulfates (persulfates): Other," this specific sub-heading differentiates itself from its siblings based on the metallic or non-metallic cation present. While 2833.40.60.10 specifically designates peroxosulfates of potassium, and 2833.40.60.50 encompasses all other remaining peroxosulfates, this heading is exclusively for those formed with ammonium. Therefore, the presence of ammonium as the primary cation is the decisive factor for classification under this code.

As this is a leaf node, there are no further subdivisions. Classification into this HTS code is finalized once it is determined that the product is a peroxosulfate and the cation is ammonium. Practical classification will rely on confirming the chemical composition through product documentation, certificates of analysis, or laboratory testing to verify the presence of both the peroxodisulfate anion and ammonium ions.