... pigment violet 23,RL CAS:6358-30-1 (P.V 23) . organic pigment violet 23,CAS ... :6358-30-1(P.V 23) Application: widely used in offset ink ... and preparation method:From 3 - amino - 9 - ethyl carbazole, adjacent two chlorobenzene, water, sodium acetate, benzyl ... acid, nitric acid, anhydrous calcium chloride and ethyl bromide, sodium acetate, adjacent two chlorobenzene and ...