2918.29.08.00 - m-Hydroxybenzoic acid

This HTS code, 2918.29.08.00, specifically classifies **m-Hydroxybenzoic acid**. This compound, also known as 3-hydroxybenzoic acid, is a carboxylic acid that features a hydroxyl group attached to the benzene ring in the meta position relative to the carboxyl group. Its classification falls under the broader category of carboxylic acids with a phenol function, excluding other oxygen-containing functional groups.

The distinction between this entry and its sibling categories lies in the precise isomer and specific compounds listed. For instance, 2918.29.22.00 covers p-Hydroxybenzoic acid (the para isomer), while other siblings enumerate distinct hydroxybenzoic acids, naphthoic acids, cresotic acids, or more complex esterified compounds like 1,6-Hexanediol bis(3,5-dibutyl-4-hydroxyphenyl)propionate. The "Other" designation within this group implies it captures hydroxybenzoic acids that do not fit into the more specific subheadings.

As this entry represents a leaf node within the HTS, there are no further subcategories. Therefore, the primary focus for classification under 2918.29.08.00 is the accurate identification of m-Hydroxybenzoic acid based on its chemical structure and properties, distinguishing it from the aforementioned related isomers and compounds listed in its sibling categories.