LIGHT GREEN SF YELLOWISH

N-?[4-?[[3,?4-?bis(sulfomethyl)?phenyl]?[4-?(diethylamino)?phenyl]?methylene]?-?2,?5-?cyclohexadien-?1-?ylidene]?-?N-?ethyl-?Ethanaminium inner salt potassium salt is an organic dye used in the preparation of negative-working heat-sensitive lithographic printing plate precursors.