2922.31.00.00 - Amfepramone (INN), methadone (INN) and normethadone (INN); salts thereof

This HTS category, 2922.31.00.00, specifically enumerates and classifies certain synthetic amino-ketone compounds, namely Amfepramone (also known as diethylpropion), methadone, and normethadone, along with their respective salts. These compounds are pharmacologically active substances, primarily recognized for their use as appetite suppressants (Amfepramone) or opioid analgesics (methadone and normethadone). Classification within this heading is contingent upon the chemical structure possessing both amine and ketone functional groups, with the specific identity of Amfepramone, methadone, or normethadone being the definitive criterion.

The immediate sibling category, 2922.39, covers "Other" amino-aldehydes, amino-ketones, and amino-quinones that do not fit the specific enumerations within 2922.31. This distinction is crucial; while both categories fall under amino-aldehydes, amino-ketones, and amino-quinones, 2922.31 is reserved for the precisely named compounds and their salts, whereas 2922.39 is for all other substances meeting the broader definition but not specifically listed. Therefore, any amino-ketone compound not identified as Amfepramone, methadone, or normethadone (or their salts) would be classified under the "Other" subheading.

As this classification (2922.31.00.00) is a leaf node within the HTS structure, there are no further subcategories. Classification efforts should therefore focus on confirming the identity of the imported or exported substance as one of the explicitly named compounds or their salts. This requires careful examination of product documentation, chemical analysis certificates, and other trade information to ensure accurate adherence to the tariff schedule.