Tags: Chemical Compound, Chemical Substance.

Green S is a green synthetic coal tar triarylmethane dye with the molecular formula C27H25N2O7S2Na.As a food dye it has E number E142. It can be used in mint sauce desserts gravy granules sweets ice creams and tinned peas. Green S is prohibited as a food additive in Canada United States Japan and Norway.[citation needed] It is approved for use as a food additive in the EU and Australia and New Zealand.Green S is a vital dye meaning it can be used to stain living cells.

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IUPAC name
(Sodium 4-[(4-dimethylaminophenyl)-(4-dimethylazaniumylidene-1-cyclohexa-25-dienylidene)methyl]-3-hydroxynaphthalene-27-disulfonate)

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