2941.10.30.00 - Carfecillin, sodium; Cloxacillin, sodium; Dicloxacillin, sodium; Flucloxacillin (Floxacillin); and Oxacillin, sodium

This HTS category, 2941.10.30.00, specifically classifies certain semi-synthetic penicillins and their sodium salts. It encompasses a defined list of antimicrobial agents: Carfecillin sodium, Cloxacillin sodium, Dicloxacillin sodium, Flucloxacillin (also known as Floxacillin), and Oxacillin sodium. These compounds are derived from the basic penicillin structure but have been chemically modified to enhance their effectiveness against specific bacterial strains, particularly those resistant to natural penicillins. Their primary use is in pharmaceutical preparations for treating bacterial infections.

This classification is distinct from its sibling category, 2941.10.50.00, which is designated for "Other" penicillins and their derivatives with a penicillanic acid structure. While 2941.10.30.00 lists specific, well-defined compounds, the "Other" category serves as a residual classification for any penicillins or their salts with a penicillanic acid structure that do not fall under the more precisely defined subheadings. Therefore, the key differentiator lies in the explicit enumeration of the substances within 2941.10.30.00 versus the broader, unlisted scope of 2941.10.50.00.

As this is a leaf node in the HTS structure, there are no further subcategories. Classification under 2941.10.30.00 is final for the enumerated substances, requiring the importer or exporter to confirm that the product precisely matches one of the listed chemical names. The classification is based solely on the identity of the active pharmaceutical ingredient, and the presence of these specific penicillins, whether as free compounds or their sodium salts, dictates its placement.