Calcium hydrogen 3-[(4-hydroxy-3-sulphonatophenyl)(4-oxo-3-sulphonato-2,5-cyclohexadien-1-ylidene)methyl]benzoate

Calcium hydrogen 3-((4-hydroxy-3-sulphonatophenyl)(4-oxo-3-sulphonato-2,5-cyclohexadien-1-ylidene)methyl)benzoate, calcium 5-[(Z)-(3-carboxyphenyl)-(4-oxo-3-sulfonatocyclohexa-2,5-dien-1-ylidene)methyl]-2-hydroxybenzenesulfonate, EINECS 264-272-4, Benzoic acid,3-((4-hydroxy-3-sulfophenyl)(4-oxo-3-sulfo-2,5-cyclohexadien-1-ylidene)methyl)-,calcium salt (1:1),