NEW MATERIAL:A disazo compound shown by the formula I [A is a group shown by the formula II (R is alkyl, alkoxy, nitro, etc.; n is an integer of 0,1,2, or 3; when n is 2 or 3, R may be either the same or different groups), a group shown by the formula III, etc.].
USE: Especially useful as a photoconductive material for a photosensitive substance of electrophotography. For example, a photosensitive substance obtained by dispersing the compound of this invention as finely divided particles (diameter about 0.05W 5μ) into a proper resin binder, e.g., polyester, etc. to form a layer which is made on an electrically conductive substrate.
PROCESS: A tetrazonium salt shown by the formula IV (X is anionic functional group) and a compound shown by the formula V are dissolved in an organic solvent, e.g., DMF, etc., and an alkali aqueous solution (e.g., aqueous solution of sodium acetate) is added dropwise to the solution at about -10°CW10°C, to give a compound shown by the formula I.