3-Hydroxy-2-naphthoic acid → Sodium 2-naphtholate

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Reaction Steps

2-hydroxynaphthalene-3-carboxylic acid is important as an intermediate for pigments or dyes. Generally, the compound is synthesized by reacting β-naphthol with sodium hydride to give sodium β-naphtholate, reacting the resulting compound with carbon dioxide under pressure to give sodium 2-hydroxynaphthalene-3-carboxylate and then, isolating the desired compound by means of acid precipitation i.e. by adding a mineral acid to the salt.

Provenance & Evidence