3204.12.30.00 - Mordant black 75; Mordant blue 1; Mordant brown 79; and Mordant red 81, 84

This HTS classification, 3204.12.30.00, specifically covers certain mordant dyes and their preparations. Mordant dyes are characterized by their ability to form a stable complex with a metal ion (the mordant) on the textile fiber, thereby fixing the color and enhancing its fastness properties. This particular code enumerates specific mordant dyes, including Mordant black 75, Mordant blue 1, Mordant brown 79, and Mordant red 81, 84. These dyes are employed in various dyeing applications where robust color retention is crucial, often on animal fibers like wool and silk.

Distinguishing this category from its siblings, it is important to note the precise nature of the dyes listed. While sibling categories 3204.12.05.00 through 3204.12.20.00 also fall under "Acid dyes, whether or not premetallized, and preparations based thereon; mordant dyes and preparations based thereon," they often list a broader range of acid dyes or different specific mordant dyes. For instance, 3204.12.17.00 includes some mordant dyes, but the specific dyes enumerated under 3204.12.30.00 are unique to this sub-heading. The "Other" category at the same level would encompass any mordant dyes and preparations not explicitly listed in the preceding sub-headings.

As this HTS code represents a leaf node, there are no further subcategories. Therefore, classification into 3204.12.30.00 is definitive based on the presence of the specified mordant dyes. Importers and exporters should ensure that the dyes in question precisely match the names and descriptions provided to ensure accurate customs declaration. This specificity is critical for maintaining the integrity of customs data and for applying the correct duty rates.