3204.19.30.00 - Sulfur black, "Colour Index Nos. 53185, 53190, and 53195"

This HTS classification covers specific sulfur dyes, identified by Colour Index Numbers 53185, 53190, and 53195. Sulfur dyes are a class of synthetic organic coloring matter known for their excellent fastness properties, particularly to washing and light, and are commonly used for dyeing cellulosic fibers such as cotton and rayon. They are produced through the sulfurization of aromatic amines, phenols, or nitro compounds. The designation "Sulfur black" specifically refers to the color achieved by these particular formulations.

This specific classification, HTS 3204.19.30.00, falls under the broader category of "Other" synthetic organic coloring matter that are not specifically enumerated in preceding subheadings. It distinguishes itself by its precise chemical composition and application as defined by the listed Colour Index numbers, differentiating it from other synthetic organic dyes or preparations which might be based on different chemical structures or offer different dyeing characteristics.

As this is a leaf node, there are no further subcategories. The classification here is specific to the defined sulfur black dyes. When classifying goods under this heading, it is essential to verify that the product in question is indeed a sulfur dye and matches one of the specified Colour Index numbers. Absence of these identifiers would necessitate a review of alternative classifications within Chapter 32.