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Chrysoine resorcinol

Chemical compound
Chrysoine resorcinol is a synthetic azo dye which was formerly used as a food additive. In Europe, it was banned as a food additive in 1977. In the US, it was banned in 1988. Chrysoine resorcinol can be used as a pH indicator with a color change... Wikipedia
Formula: C12H9N2NaO5S
Molar mass: 316.27 g/mol
PubChem CID: 6093186