2922.29 - Other:

This HTS category, **2922.29 Other**, encompasses a broad range of amino-phenols and amino-naphthols, their ethers and esters, and their salts. Crucially, these compounds are characterized by containing a single oxygen function (such as a hydroxyl group) alongside an amino group attached to either a phenol or naphthalene ring. The "Other" designation signifies that this subheading captures all such compounds not specifically enumerated in preceding subheadings within the 2922.29.00 series.

This category serves as a residual classification, distinct from its sibling, **2922.21 Aminohydroxynaphthalenesulfonic acids and their salts**. While both deal with substituted naphthols and phenols, 2922.21 is exclusively for compounds that also contain a sulfonic acid group. Therefore, 2922.29.00 covers amino-phenols and amino-naphthols that lack this specific sulfonic acid functionality.

Within 2922.29, further subdivisions exist to classify specific groups of these compounds. These include well-defined chemical entities like o-Anisidine, p-Anisidine, and p-Phenetidine (2922.29.03.00), and a diverse array of other substituted phenols and naphthols such as 2-Amino-6-chloro-4-nitrophenol and m-Aminophenol (2922.29.10.00). Other subcategories distinguish based on the presence and type of alkyl or aryl substituents on the amino or oxygen groups, or further modifications to the aromatic rings, facilitating precise classification based on chemical structure and composition.