2916.39.04.00 - m-Chloroperoxybenzoic acid; andp-Sulfobenzoic acid, potassium salt

This HTS subheading, 2916.39.04.00, encompasses specific aromatic monocarboxylic acid derivatives, namely m-Chloroperoxybenzoic acid (m-CPBA) and the potassium salt of p-Sulfobenzoic acid. m-CPBA is a widely used oxidizing agent in organic synthesis, particularly for epoxidation and Baeyer-Villiger oxidations. The potassium salt of p-Sulfobenzoic acid serves various industrial applications, often as an intermediate or additive.

Distinguishing this subheading from its siblings, such as 2916.39.03.00 which lists various anhydrides, peroxybenzoates, and nitro-substituted toluic acids, is crucial. While both fall under "Other aromatic monocarboxylic acids," 2916.39.04.00 is specifically reserved for m-CPBA and the potassium salt of p-Sulfobenzoic acid, based on their unique chemical structures and functions. Other siblings like Cinnamic acid (2916.39.06.00) or various chlorinated and nitrated benzoic acids (e.g., 2916.39.08.00, 2916.39.12.00) represent different substituents or acid structures entirely.

As this is a leaf node, there are no further subdivisions within this specific HTS code. Classification into 2916.39.04.00 is determined by the precise identity of the imported chemical as either m-Chloroperoxybenzoic acid or p-Sulfobenzoic acid, potassium salt, aligning with the established scope of aromatic monocarboxylic acid derivatives under Chapter 29.