3204.11.18.00 - N-[2-[(2,6-Dicyano-4-methylphenylazo]-5- (diethylamino)-phenyl] methanesulfonamide; and N-[2-[2,6-Dicyano-4-methylphenylazo]-5- (di-1-propylamino) phenyl]methanesulfonamide

This HTS category encompasses specific synthetic organic disperse dyes identified by their chemical names: N-[2-[(2,6-Dicyano-4-methylphenylazo]-5- (diethylamino)-phenyl] methanesulfonamide and N-[2-[2,6-Dicyano-4-methylphenylazo]-5- (di-1-propylamino) phenyl]methanesulfonamide. These are complex azo dyes formulated for use in dyeing synthetic textile fibers, particularly polyester. Their classification under "Disperse dyes and preparations based thereon" signifies their application as finely dispersed solids that are insoluble in water but can be applied to hydrophobic fibers from an aqueous dispersion.

Distinguishing this classification from its siblings, 3204.11.10.00 and 3204.11.15.00, is crucial. While 3204.11.10.00 lists a broad array of other named disperse dyes (e.g., Disperse blue 19, Disperse red 44), and 3204.11.15.00 specifically covers Disperse blue 30, this particular category is reserved for the two precisely defined methanesulfonamide compounds. The "Other" designation at the same level indicates a catch-all for any disperse dyes not otherwise enumerated.

As this node is a leaf node within the HTS structure, there are no further subcategories. Classification under 3204.11.18.00 is final for these specific chemical entities, with the defining characteristic being their precise chemical structure as stated in the description, rather than a general dye name or a broader compositional criteria.