9902.08.21 - Sodium 4-({3-[(E)-(2-methyl-4-{[(4-methylphenyl)sul- fonyl]oxy}phenyl)diazenyl]phenyl}amino)-3- nitrobenzenesulfonate (Acid orange 67) (CAS No. 12220-06-3) (provided for in subheading 3204.12.45)

This HTS category, 9902.08.21, specifically classifies a particular azo dye known as Sodium 4-({3-[(E)-(2-methyl-4-{[(4-methylphenyl)sul- fonyl]oxy}phenyl)diazenyl]phenyl}amino)-3- nitrobenzenesulfonate, also identified as Acid Orange 67 (CAS No. 12220-06-3). While the broader Chapter 99 of the Harmonized Tariff Schedule deals with temporary legislation, trade agreement modifications, and specific import restrictions, this subheading is a precise designation for this single chemical compound.

Distinguishing this category from its siblings at the root level, which encompass a vast array of live animals such as horses, bovine animals, swine, sheep, goats, and poultry, is straightforward. Category 9902.08.21 is exclusively for a specific synthetic organic chemical dye, a product of chemical synthesis with applications in dyeing and coloring. It does not pertain to live animals in any capacity.

As a leaf node within the HTS, category 9902.08.21 has no further subcategories. Its classification is final, directing importers to a specific provision that acknowledges the existence and regulatory treatment of Acid Orange 67. The "provided for in subheading 3204.12.45" notation indicates that while this temporary legislation applies, the permanent classification for this dye resides within Chapter 32, specifically under synthetic organic coloring matter. Importers must adhere to the regulations and potential restrictions associated with this Chapter 99 provision when importing this specific dye.