2935.90.33.00 - Sulfathiazole and Sulfathiazole, sodium

This HTS classification, 2935.90.33.00, specifically covers Sulfathiazole and its sodium salt. Sulfathiazole is a sulfonamide antibacterial drug, historically significant for its broad-spectrum activity against various bacterial infections. The inclusion of its sodium salt indicates that preparations where Sulfathiazole is presented in a water-soluble salt form are also classified here, typically for enhanced administration or formulation.

Distinguishing this category from its siblings, it's important to note that 2935.90.33.00 is precise to Sulfathiazole. Other sibling codes, such as 2935.90.30.00 for Sulfamethazine or 2935.90.42.00 for Sulfadiazine and Sulfapyridine, classify distinct sulfonamide compounds. While all fall under the broader umbrella of "Other" sulfonamides and "Drugs," the specific chemical identity of the sulfonamide is the primary differentiating factor at this level.

As this is a leaf node within the HTS, there are no further subcategories branching from 2935.90.33.00. Therefore, classification within this code is determined solely by the presence and identification of Sulfathiazole or Sulfathiazole, sodium. Importers and exporters should ensure that the product documentation accurately reflects the chemical composition to align with this specific classification.