2937.90.20.00 - Other

This HTS category, 2937.90.20.00, encompasses catecholamine hormones, their synthetic derivatives, and structural analogues not specifically classified elsewhere within the 2937.90 subheading. Catecholamines are a group of hormones and neurotransmitters, with the most common being dopamine, norepinephrine (noradrenaline), and epinephrine (adrenaline). This classification would include the pure chemical compounds of these substances, as well as synthesized molecules that closely mimic their structure and function, used primarily for their hormonal effects.

The distinction between this residual category and its sibling, 2937.90.10.00, is specific to the exclusion of epinephrine hydrochloride. While epinephrine is a catecholamine hormone, its hydrochloride salt form is explicitly placed under the sibling code. Therefore, 2937.90.20.00 is for all other catecholamine hormones and their derivatives and analogues, excluding any form of epinephrine hydrochloride.

As this is a leaf node, there are no further subcategories. The classification relies on the chemical identity of the substance and its primary intended use as a hormone. When classifying goods under this code, it is crucial to confirm that the product is indeed a catecholamine hormone or a direct structural analogue, and that it is not epinephrine hydrochloride, which has a dedicated classification.