3Hydroxybenzoate

3-Hydroxybenzoate is the conjugate base (or a salt) derived from 3-hydroxybenzoic acid, and is commonly referred to as meta-hydroxybenzoate. It is a substituted benzoate ion in which a carboxylate group is attached to the benzene ring at position 1 and a hydroxyl group is at position 3. In neutral or basic solution, the carboxyl group is deprotonated, giving the 3-hydroxybenzoate anion; under acidic conditions, the neutral 3-hydroxybenzoic acid form predominates.

Structure and properties: Like other benzoates, 3-hydroxybenzoate is a weak acid. The carboxylate moiety can donate a proton to form the monoanionic species, while the phenolic hydroxyl is less acidic and remains largely protonated under ordinary conditions. The presence of the meta-hydroxyl group influences the acidity and reactivity relative to other hydroxybenzoate isomers.

Occurrence and production: 3-Hydroxybenzoates occur in nature as metabolites resulting from the microbial or enzymatic breakdown of aromatic compounds. They are also prepared synthetically as building blocks for organic synthesis, where the benzoate core serves as a versatile platform for further derivatization.

Applications: In research and industry, 3-hydroxybenzoates are used as intermediates in the synthesis of esters, salts, and other derivatives. They can serve as precursors for dyes, pharmaceuticals, and various polymer or coordination-chemistry building blocks.

Safety: 3-Hydroxybenzoates, like other benzoate derivatives, are generally of low to moderate toxicity but can be irritants in concentrated forms. Standard laboratory handling, storage, and disposal practices should be followed, including use of appropriate personal protective equipment.