2921.46.00.00 - Amfetamine (INN), benzfetamine (INN), dexamfetamine (INN), etilamfetamine (INN), fencamfamin (INN), lefetamine (INN), levamfetamine (INN), mefenorex (INN) and phentermine (INN); salts thereof

This HTS category, 2921.46, specifically enumerates and classifies a distinct group of thirteen scheduled stimulant amphetamine-type substances (ATS), along with their salts. These compounds are characterized by their amine functional group and aromatic structure, but are set apart by their specific pharmacological activity and regulatory status. The primary purpose of this classification is to ensure accurate tracking and control of these substances, many of which are controlled under international drug conventions due to their potential for abuse.

Unlike its sibling categories which broadly cover aniline, aniline derivatives, toluidines, diphenylamine, and naphthylamines, 2921.46 is highly specific. It does not encompass general aromatic amines but rather a precisely defined list of individual compounds such as amphetamine, benzphetamine, and phentermine, and their corresponding salts. The distinction lies in the precise chemical identity and the often-regulated nature of the substances classified here, as opposed to broader classes of aromatic amines.

As this is a leaf node within the HTS classification system, there are no further subcategories. Therefore, the classification is definitive for the listed substances. Importers and exporters must ensure that the goods precisely match one of the named compounds or their salts to fall under this heading. Any ambiguity in the identity of the substance, or if it represents a derivative not explicitly listed, would necessitate a review of other potentially applicable HTS codes.