9902.01.65 - Sodium oxosilanediolate hydrate (2:1:9) (Sodium metasilicate nonahydrate) (CAS No. 13517-24-3) (provided for in subheading 2839.11.00)

This HTS category, 9902.01.65, specifically covers Sodium oxosilanediolate hydrate (2:1:9), also known as Sodium metasilicate nonahydrate. This substance, identified by CAS No. 13517-24-3, is a hydrated form of sodium metasilicate, characterized by a specific stoichiometric ratio of sodium to silicon and the presence of nine water molecules of hydration. Its primary applications often involve its alkaline properties, serving as a builder in detergents, an adhesive, a deflocculant, or in various industrial processes such as metal cleaning and water treatment.

As this classification resides within Chapter 99, it signifies a temporary modification or special provision, as opposed to the permanent classifications found in Chapters 1-97. Therefore, direct comparison with siblings like live animals (e.g., 0101, 0102) is not applicable, as Chapter 99 is reserved for specific trade agreement provisions, temporary legislation, or Section 22 import restrictions, and deals with a distinct set of items outside the standard commodity classifications.

Given that 9902.01.65 is a leaf node, there are no further subcategories. The classification is definitive for Sodium metasilicate nonahydrate when imported under the specific conditions or for the purposes for which this Chapter 99 provision is invoked. It is crucial to note that the goods provided for in this subheading are also provided for in subheading 2839.11.00, indicating that the primary tariff classification for this chemical compound under normal circumstances would be within Chapter 28, and this Chapter 99 entry represents a supplemental or temporary treatment.