Synonyms: Copper,[hydrogen phthalocyaninesulfonato(2-)]- (7CI,8CI); Cuprate(1-),[29H,31H-phthalocyanine-C-sulfonato(3-)-N29,N30,N31,N32]-, hydrogen;Cuprate(1-), [29H,31H-phthalocyanine-C-sulfonato(3-)-kN29,kN30,kN31,kN32]-,hydrogen (9CI); Phthalocyaninesulfonic acid, copper deriv. (6CI);29H,31H-Phthalocyanine-C-sulfonic acid, copper complex; Copper phthalocyaninemonosulfonic acid; Monosulfophthalocyaninatocopper