2-(4-Chlorobenzoyl)benzoic acid forms complexes with europium and terbium having photoluminescence properties.用作医药、染料中间体，用于生产氯噻酮、2-氯蒽醌等 2-(4-Chlorobenzoyl)benzoic acid forms complexes with europium and terbium having photoluminescence properties. 2-(4-Chlorobenzoyl)benzoic acid was used in the preparation of bisphthalazinone monomers, required for the synthesis of phthalazinone containing poly(arylene ether)s, poly(arylene thioether)s and poly(arylene sulfone)s.