2937.23.50.10 - Estrogens

This classification, HTS Code 2937.23.50.10, specifically encompasses "Estrogens." Estrogens are a group of steroid hormones that play a crucial role in the development and regulation of the female reproductive system and secondary sex characteristics. This category covers natural estrogens extracted from biological sources, as well as synthetic estrogens and their structural analogues that are produced through chemical synthesis but retain similar physiological activity. The primary use of these substances is for their hormonal effects.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. The distinction from potential sibling categories would lie in the specific type of steroidal hormone. For instance, it is distinct from progestins, which are another class of steroidal hormones with different physiological functions, even though both are grouped under the broader heading of "Estrogens and progestins." The classification here is precise to estrogenic compounds.

The classification of goods under HTS Code 2937.23.50.10 is determined by their chemical structure and primary function as estrogens. This includes a wide array of compounds, such as estradiol, estrone, and estriol, along with their various derivatives and synthetic counterparts designed for pharmaceutical, research, or other industrial applications. Importers and exporters must ensure that documentation accurately reflects the nature and intended use of these substances to facilitate proper customs clearance.