2922.19.20.00 - 4,4'-Bis(dimethylamino) benzhydrol (Michler's hydrol); 5'-[3'-(Dimethylamino) propyl]-10',11'- dihydro-5H'-dibenzo [a,b] cyclohept- en-5'-ol (Dibenzcarbinol); and 1-(p-Nitrophenyl)-2-amino-1,3- propanediol

This HTS category, 2922.19.20.00, specifically covers certain aromatic amino-alcohols. The listed chemicals, including 4,4'-Bis(dimethylamino) benzhydrol (Michler's hydrol), 5'-[3'-(Dimethylamino) propyl]-10',11'- dihydro-5H'-dibenzo [a,b] cyclohept- en-5'-ol (Dibenzcarbinol), and 1-(p-Nitrophenyl)-2-amino-1,3- propanediol, are characterized by the presence of both amino and alcohol functional groups attached to aromatic rings, with no other oxygen-containing functional groups besides the hydroxyl. Their classification under this heading is dependent on meeting these structural and functional criteria.

This specific classification differentiates itself from its sibling category, 2922.19.33.00, which covers a distinct set of aromatic amino-alcohols. The key difference lies in the specific chemical structures and substituents outlined in each heading. While both fall under "Amino-alcohols, other than those containing more than one kind of oxygen function, their ethers and esters; salts thereof: Other: Aromatic: Other," the precise chemical identity and arrangement of functional groups are the determining factors for classification.

As this is a leaf node within the HTS, there are no further subcategories. Therefore, classification within 2922.19.20.00 relies solely on identifying the imported product as one of the specifically enumerated chemicals or a chemical that precisely matches the structural characteristics defined by the presence of an aromatic ring, an amino group, and a single hydroxyl group, without other oxygen functional groups. This requires careful consideration of the chemical structure and nomenclature of the imported substance.