Used in the preparation of nicotinic acid and hydroxyquinoline drugs, bitter blue pigment and photosensitive pigment, rubber accelerator and pesticide quinolin-8-ol. Used as organic synthesis reagent, basic condensation agent and solvent. It is used as analytical reagent, solvent and separation of vanadate and arsenate. It can also be used as an acid, solvent, preservative, etc. . In the pharmaceutical industry, it is used in the production of NIACIN and Quinolin-8-ol. In the printing and dyeing industry, it is used in the production of bitter blue pigment and light sensitive pigment.