9902.01.55 - Sodium Thiosulfate Pentahydrate (Sodium sulfurothioate hydrate (2:1.5)) (CAS No.10102-17-7) (provided for in subheading 2832.30.10)

This HTS category, 9902.01.55, specifically covers Sodium Thiosulfate Pentahydrate, also known by its chemical name Sodium sulfurothioate hydrate (2:1.5). This compound, identified by CAS No. 10102-17-7, is primarily recognized for its chemical properties and applications, often found as a photographic fixer, an antichlor in textile manufacturing, or in water treatment processes. It is important to note that while this HTS code is in Chapter 99, its primary classification for tariff purposes is provided for in subheading 2832.30.10, indicating its nature as a chemical compound.

Distinguishing this category from its siblings in the broader HTS system is crucial for accurate classification. Unlike the live animals found in Chapters 1 through 5, or raw materials and manufactured goods in other sections, this node pertains to a specific, synthesized chemical substance. Its placement within Chapter 99 signifies a temporary modification or special provision, distinct from the standard classification of chemical products found in Chapter 28, to which it is linked.

As this is a leaf node within Chapter 99, there are no further subcategories or subdivisions. Therefore, classification under 9902.01.55 relies on the precise identification of the imported merchandise as Sodium Thiosulfate Pentahydrate, fulfilling the criteria of the temporary provision it falls under. Importers should verify that the goods precisely match the chemical identity and form described to ensure correct application of this special classification.