Used for the preparation of nicotinic acid and

hydroxyquinoline drugs, cyanine blue pigment

and photosensitive pigments, rubber promotors and

pesticides such as 8-hydroxyquinoline. As an

analytical reagent, it is also used for the separation of vanadate and

arsenate. Make cardiac tonic, also can be used for acid, preservative, etc.

The pharmaceutical industry is used to make nicotinic acid and 8-

hydroxyquinoline drugs; The printing and dyeing industry is used to make

cyanine blue pigment and photosensitive pigment, etc.