Synonyms: Cuprate(5-),[5-[[3-carboxy-4-[[5-[(2,4-disulfophenyl)azo]-2,4-dihydroxyphenyl]azo]phenyl]methyl]-2-[[5-[(2,4-disulfophenyl)azo]-2-(hydroxy-kO)-4-hydroxyphenyl]azo-kN1]benzoato(7-)-kO]-, pentasodium (9CI);Cuprate(5-),[[3,3'-methylenebis[6-[[3-[(2,4-disulfophenyl)azo]-2,4-dihydroxyphenyl]azo]benzoato]](7-)]-,pentasodium; Benzoic acid,3,3'-methylenebis[6-[[3-[(2,4-disulfophenyl)azo]-2,4-dihydroxyphenyl]azo]-,copper complex