2918.23.50.00 - Other

This HTS category, 2918.23.50.00, encompasses "Other" esters of salicylic acid and their salts, falling under the broader classification of carboxylic acids with phenol function but without other oxygen function. Essentially, it covers those salicylic acid derivatives that are esters or salts and do not fit into more specific, previously enumerated subheadings within this group. The "other" designation signifies that this is a residual category for these types of compounds.

Crucially, this subheading distinguishes itself from its sibling, 2918.23.30.00, which specifically covers products described in additional U.S. note 3 to section VI. Therefore, for classification purposes, goods must be assessed to determine if they meet the criteria outlined in that specific additional U.S. note. If a product is an ester or salt of salicylic acid and does not fall under any other specific designation and is *not* covered by additional U.S. note 3, it will likely be classified here.

As this is a leaf node within the HTS structure, there are no further subcategories to explore. Classification within 2918.23.50.00 relies on a process of elimination, ensuring that the product is indeed an ester or salt of salicylic acid, possesses the requisite phenolic and carboxylic acid functionalities, and does not qualify for more precise classifications either within the esters of salicylic acid group or due to specific U.S. notes. Examples might include less common or proprietary salicylic acid esters and their corresponding salts.