... assurance!! organic pigment violet 23,RL CAS:6358-30-1 (P.V 23) . organic pigment violet 23,CAS:6358-30-1 ... chloride and four chloranil mixtures at 40 to 60 DEG C heating 1h. And then up to 150 to 160 ... DEG C, steamed out of reactants in the water. Then the ... sulfonyl chloride processing and heated to 165 to 170 DEG C, the temperature is maintained for the 6h, the yield ...