2937.23.50 - Other

This HTS category, 2937.23.50, encompasses steroidal hormones, their derivatives, and structural analogues that function primarily as estrogens or progestins, but are not specifically listed under other subheadings within this group. This includes compounds that exhibit estrogenic or progestogenic activity, whether derived from natural sources or synthesized. The key classification criterion is their principal use as hormones of these specific types.

Unlike the sibling category 2937.23.25.00, which specifically enumerates estradiol benzoate and estradiol cyclopentylpropionate (estradiol cypionate), this category is reserved for other steroidal estrogens and progestins. Therefore, if a steroidal hormone has estrogenic or progestogenic properties but is not one of the explicitly named compounds in the sibling category, it will likely fall under this "Other" designation.

Within this broad category, further distinctions are made. Subheading 2937.23.50.10 specifically addresses estrogens, while the remaining items are categorized under a further "Other" subheading. This subdivision allows for a more granular classification of steroidal hormones and their derivatives that fall under the scope of estrogens and progestins, distinguishing between primary estrogenic compounds and other related substances within this class.