2939.19.10.00 - Papaverine and its salts

This HTS category, 2939.19.10.00, specifically classifies Papaverine and its salts. Papaverine is an alkaloid extracted from opium poppy or synthesized chemically. It is primarily known for its smooth muscle relaxant properties and has been historically used as an antispasmodic medication. This classification pertains to Papaverine itself, as well as its various salt forms (e.g., papaverine hydrochloride), which are often created to improve solubility and bioavailability for pharmaceutical applications.

This classification sits within the broader category of "Other" alkaloids of opium and their derivatives, and their salts. The preceding subheadings under "Alkaloids of opium and their derivatives; salts thereof" would typically cover more specifically defined opium alkaloids like morphine and codeine, and their derivatives. Therefore, 2939.19.10.00 serves as a residual classification for opium alkaloids and their salts that do not fall under those more narrowly defined headings.

As this is a leaf node within the HTS, there are no further subcategories for this specific classification. Consequently, the focus for classification under 2939.19.10.00 is on identifying the substance as Papaverine or a salt thereof, distinct from other more commonly known or specifically enumerated opium alkaloids. The physical form (e.g., powder, crystal, or pre-formulated salts) is generally not determinative for classification at this level, provided the chemical identity as Papaverine or its salts is established.