2916.39.06.00 - Cinnamic acid

This category encompasses cinnamic acid, a white crystalline organic compound with the chemical formula C9H8O2. Cinnamic acid is characterized by its aromatic ring directly attached to an acrylic acid group, making it a monocarboxylic acid derivative of aromatic compounds. Its classification under "Other" signifies that it does not fall under more specific subheadings within the aromatic monocarboxylic acid group, such as those defined by particular substituents or functionalities.

While other sibling categories within 2916.39 list specific halogenated, nitrated, or esterified benzoic acid derivatives, or even complex pharmaceutical compounds like Ibuprofen, this subheading is dedicated solely to cinnamic acid itself. The distinction lies in the specific chemical structure and lack of additional functional groups or complex molecular arrangements present in the listed siblings.

As this is a leaf node within the HTS classification system, there are no further subcategories under HTS 2916.39.06.00. Therefore, the classification of cinnamic acid is definitive at this level. Importers and exporters should ensure that the chemical identity precisely matches cinnamic acid to utilize this code.