3204.19.20.40 - Solvent yellow 163

This HTS classification, specifically 3204.19.20.40, covers Solvent Yellow 163. This category falls under "Other" solvent dyes and preparations based thereon, and further narrows down to products described in additional U.S. note 3 to section VI. Solvent Yellow 163 is a synthetic organic coloring matter designed for use in applications where it dissolves in the medium it colors, rather than being dispersed. Its primary function is to impart a yellow hue to various materials, often plastics, inks, and coatings, where solubility is a key requirement.

Distinguishing this specific classification from its siblings, 3204.19.20.20 (Solvent Red 179) and 3204.19.20.90 (Other), is straightforward. While all are classified as solvent dyes, Solvent Yellow 163 is distinct due to its inherent chemical structure that results in a yellow coloration. Solvent Red 179, conversely, is defined by its red coloration, and the "Other" category encompasses any solvent dyes not specifically listed or defined elsewhere within this sub-heading.

As this is a leaf node, there are no further subcategories. Classification at this level relies on the precise identification of the coloring matter as Solvent Yellow 163, meeting the solubility requirements of a solvent dye, and fulfilling any criteria outlined in additional U.S. note 3 to section VI, which may specify particular properties or origins for such products.