2922.42.50.00 - Other

This HTS category, 2922.42.50.00, encompasses "Other" amino-acids, and their esters or salts, not containing more than one kind of oxygen function, that are not otherwise specified. This residual classification is for compounds that fit the broad definition of amino-acids with a single oxygen function (such as a carboxyl group) but do not fall into more specific subheadings within the amino-acid family, beyond those already categorized.

Crucially, this category distinguishes itself from its sibling, 2922.42.10.00 (Monosodium glutamate). While monosodium glutamate is a specific salt of glutamic acid, this "Other" category covers a broader range of amino-acids and their derivatives that are not monosodium glutamate. It is important to note that the exclusion of multiple oxygen functions remains a key criterion for inclusion within the broader 2922.42 heading.

As this is a leaf node, there are no further subdivisions. Therefore, classification under 2922.42.50.00 relies on definitively ruling out more specific classifications for amino-acids and their salts or esters. Importers must carefully examine the chemical structure and functional groups of the product to ensure it does not meet the criteria for any other subheading within Chapter 29, particularly those relating to other amino-acids or compounds with multiple oxygen functions.