3003.31.00.00 - Containing insulin

This HTS category, 3003.31.00.00, specifically covers medicaments that contain insulin. These products are characterized by being mixtures of two or more constituents intended for therapeutic or prophylactic use, and they are not presented in measured doses or in forms or packings specifically for retail sale. The key defining element for this classification is the presence of insulin as a principal active ingredient.

Distinction from sibling category 3003.39 ("Other") is critical. While both fall under the broader heading of medicaments containing hormones or other products of heading 2937, 3003.31.00.00 is exclusively for those where insulin is the active component. Category 3003.39 would encompass other medicaments within this group that contain different hormones or products of heading 2937 but do not contain insulin.

As this is a leaf node in the HTS structure, there are no further subcategories. Therefore, the classification hinges entirely on the presence and identification of insulin as a constituent ingredient, coupled with the general characteristics of medicaments not put up for retail sale that are outlined in heading 3003. This level of detail ensures accurate classification for imported or exported goods containing insulin for medicinal purposes.