The molecule is a naphthalenediol that is naphthalene-1,4-diol bering a carboxy substituent at position 6. It is a monocarboxylic acid, a member of naphthalenediols and a naphthohydroquinone. It is a conjugate acid of a 1,4-dihydroxy-6-naphthoate.
5,8-dihydroxynaphthalene-2-carboxylic acid