9902.08.46 - Isoviolanthrone (C.I. Vat Violet 10) (CAS No. 128-64-3) (provided for in subheading 3204.15.80)

This HTS classification, 9902.08.46, specifically addresses Isoviolanthrone, also known by its Colour Index name, C.I. Vat Violet 10, and identified by CAS Number 128-64-3. This chemical compound is a vat dye known for its deep violet color and is typically used in the textile industry for dyeing and printing fabrics. Its inclusion under Chapter 99 signifies a temporary or specific trade measure, often related to import quotas, duties, or restrictions that are distinct from the standard classifications of chemicals found in other chapters.

While sibling categories at the Chapter 99 level might cover various temporary import adjustments for different product types, this specific code is exclusively for Isoviolanthrone. Its distinction lies in its precise chemical identity and its provision within a temporary legislation framework, as indicated by its reference to subheading 3204.15.80, which covers other synthetic organic coloring matter. This means that while the general classification of vat dyes might fall under Chapter 32, this specific HTS code imposes particular trade rules applicable only to Isoviolanthrone.

As this is a leaf node within the HTS database, there are no further subcategories that subdivide Isoviolanthrone. Therefore, classification decisions at this level would focus on verifying the imported substance matches the chemical description and CAS number provided. Compliance with any associated temporary legislation or restrictions proclaimed under Chapter 99 is the primary consideration for importers handling Isoviolanthrone.