2918.22.50.00 - Salts and esters of O-acetylsalicylic acid

This HTS category, 2918.22.50.00, specifically covers the salts and esters derived from O-acetylsalicylic acid. These are chemical compounds formed when the acidic hydroxyl group of salicylic acid is acetylated, and subsequently, either the remaining carboxylic acid group or the phenolic hydroxyl group is involved in forming a salt or an ester linkage. Examples include sodium salicylate and various acetate esters of salicylic acid, which may find use as chemical intermediates or in pharmaceutical formulations.

It is important to distinguish this category from its sibling, 2918.22.10.00, which exclusively classifies O-acetylsalicylic acid itself (commonly known as Aspirin). While both fall under the broader heading for O-acetylsalicylic acid, its salts and esters, this specific subcategory is for the compounds where O-acetylsalicylic acid has undergone further chemical modification through salt formation or esterification. The primary distinction lies in the presence of a salt or ester group in addition to the acetylated salicylic acid structure.

As this is a leaf node within the HTS, there are no further subcategories for this specific classification. Therefore, the focus for classification purposes under 2918.22.50.00 is on accurately identifying goods as salts or esters of O-acetylsalicylic acid, ensuring they meet the chemical definitions and do not fit solely within the classification for the parent acid.