Английская Википедия:Chrysoine resorcinol
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Шаблон:Redirect Шаблон:Chembox Chrysoine resorcinol is a synthetic azo dye which was formerly used as a food additive.Шаблон:Citation needed In Europe, it was banned as a food additive in 1977.[1] In the US, it was banned in 1988.[2]
Chrysoine resorcinol can be used as a pH indicator with a color change between pH 11 and pH 12.7. In colorimetry, it has an absorption maximum of 387 nm.
Preparation
Acid orange 6 can be synthesised via the azo coupling of sulfanilic acid and resorcinol,
Notes
External links