2922.49.37.00 - Other

This HTS classification, 2922.49.37.00, covers "Other" amino-acids, not containing more than one kind of oxygen function, and their esters; salts thereof, that are aromatic in nature and do not fall under specific preceding subdivisions. It represents a residual category for a diverse array of aromatic amino-acids and their derivatives that do not meet the criteria for more narrowly defined classifications within heading 2922.49.

This classification distinguishes itself from its sibling category, 2922.49.30.00, which specifically pertains to products described in additional U.S. note 3 to section VI. Therefore, 2922.49.37.00 encompasses all aromatic amino-acids, their esters, and salts that *do not* meet the conditions outlined in that specific additional U.S. note. The classification hinges on the absence of specific functional groups beyond the amino and single oxygen function, the aromatic structure, and exclusion from the explicitly defined sibling category.

As this is a leaf node, there are no further subcategories to introduce. Classification at this level is determined by the absence of specific differentiating characteristics that would place a product in a more specific subheading. Practical classification will rely on chemical analysis and knowledge of the specific structure and properties of the amino-acid, ester, or salt in question to confirm it fits this residual "Other" designation.