2933.32 - Piperidine and its salts:

This HTS category encompasses piperidine, a cyclic amine characterized by a six-membered ring containing five carbon atoms and one nitrogen atom, along with its various salts. Piperidine serves as a fundamental building block in organic synthesis and is frequently employed in the pharmaceutical industry for the production of a wide range of drugs, including anesthetics, antihistamines, and antipsychotics. It is also used as a solvent and in the manufacture of rubber accelerators and pesticides.

Distinguishing this category from its siblings, 2933.32 specifically addresses piperidine and its salts, differentiating it from pyridine and its salts (2933.31). Furthermore, it excludes the more complex substituted piperidine derivatives and other heterocyclic compounds listed under subsequent sibling codes, such as specific controlled substances (2933.33, 2933.34), 3-quinuclidinol (2933.35), and 4-anilino-N-phenethylpiperidine (ANPP) (2933.36). The focus here is on the parent piperidine structure and its direct salt forms.

The subcategories for 2933.32 provide further detail for classification. 2933.32.10.00 specifically covers piperidine itself, as a pure chemical substance. The remaining classifications fall under 2933.32.50.00, which is for all other salts and derivatives of piperidine that do not fall under the more specific heading for piperidine itself. This subdivision allows for precise tariff assignment based on whether the product is the free base or a salt.