2922.50 - Amino-alcohol-phenols, amino-acid-phenols and other amino-compounds with oxygen function:

This HTS category, 2922.50, encompasses a specific group of amino-compounds that possess an oxygen function, namely amino-alcohol-phenols and amino-acid-phenols, along with other amino-compounds featuring an oxygen functional group. These compounds are characterized by the presence of both an amino group (-NH2, -NHR, or -NR2) and at least one phenolic hydroxyl group (-OH attached to an aromatic ring) or a carboxyl group (-COOH) or its ester derivative, in addition to other oxygen-containing functional groups.

Distinguishing this category from its siblings is crucial for accurate classification. While other sibling categories focus on amino-alcohols, amino-naphthols and other amino-phenols (without other oxygen functions beyond the phenolic hydroxyl), amino-aldehydes, amino-ketones, amino-quinones, and amino-acids, category 2922.50 specifically includes compounds where these amino functionalities are combined with a phenolic moiety and another oxygen function, or where the amino and phenolic groups are intrinsically linked with additional oxygen-containing groups that define the compound's structure and properties. The presence of multiple oxygen functions in conjunction with amino and phenolic characteristics is a key differentiator.

The subcategories within 2922.50 further refine classification based on the structural origin of the amino-alcohol-phenol or amino-acid-phenol. The distinction between "Aromatic" and "Other" helps to segregate compounds based on whether the phenolic hydroxyl group is directly attached to an aromatic ring system and the overall structural complexity of the molecule. This subdivision allows for a more granular approach to tariff classification, catering to the diverse array of chemical entities that fall under this broad description.