dihydroxy[29h,31h-phthalocyaninato(2-)-kn29,kn30,kn31,kn32]-silicon silicon(IV) phthalocyanine dihydroxide Silicon dihydroxyl phthalocyanine Silicon Dihydroxy Phthalocyanine Silicon phthalocyanine dihydroxide Dye content 75 % Silicon,dihydroxy[29H,31H-phthalocyaninato(2-)-kN29,kN30,kN31,kN32]-, (OC-6-12)- dihydroxy(phthalocyanino)silicon