9902.10.39 - Mixtures of polyethylene glycol (CAS No. 25322-68-3), (acetate) pentammine cobalt dinitrate (CAS No. 14854-63-8), and zinc carbonate (CAS No. 3486-35-9) (provided for in subheading 3815.90.50)

This HTS category, 9902.10.39, specifically covers certain mixtures comprised of polyethylene glycol (CAS No. 25322-68-3), (acetate) pentammine cobalt dinitrate (CAS No. 14854-63-8), and zinc carbonate (CAS No. 3486-35-9). These particular mixtures are provided for under subheading 3815.90.50, indicating their classification as preparation or charges for manufacturing or repair, but are subject to the temporary legislative provisions within Chapter 99. The inclusion of specific chemical compounds with their CAS numbers ensures precise identification and differentiation.

This classification is unique within its Section XXII context as it represents a specific, temporary modification or restriction rather than a general classification of goods. Unlike the primary HTS categories that classify goods based on their inherent material or function (e.g., live animals in Chapter 1), this code addresses a particular import scenario governed by special provisions. Therefore, its distinction from sibling categories lies not in the nature of the goods themselves in a general sense, but in the specific regulatory framework under which they are being classified.

As a leaf node, HTS code 9902.10.39 does not have further subcategories. This signifies that any importation fitting the precise description of the polyethylene glycol, pentammine cobalt dinitrate, and zinc carbonate mixture will be classified directly under this specific HTS code, subject to the temporary legislation and potential additional import restrictions indicated by its position within Chapter 99 and Section XXII. Classification professionals should meticulously verify the presence and proportion of all listed chemical components to ensure accurate application of this provision.