2915.50.10.00 - Propionic acid

This HTS classification covers pure propionic acid, a simple saturated acyclic monocarboxylic acid. It is characterized by its three-carbon chain and the presence of a carboxyl group (-COOH). Propionic acid is a colorless liquid with a pungent odor and is widely used in various industries, including as a preservative in animal feed, a solvent, and a precursor in the synthesis of other chemicals.

This specific heading distinguishes itself from "Other" categories within the broader "Saturated acyclic monocarboxylic acids..." by exclusively identifying propionic acid and its direct derivatives like salts and esters. While other headings might cover chemically similar compounds or more complex derivatives, this classification is narrowly focused on propionic acid itself, as well as its direct ionic forms (salts) and esterified compounds. The distinction lies in the precise chemical identity and structural simplicity of the substances classified here.

As this classification is a leaf node, there are no further subcategories. Classification under HTS 2915.50.10.00 is definitive for propionic acid and its immediate salts and esters, ensuring straightforward identification for customs purposes. The focus is on the presence of the propionic acid molecule as the primary component.