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 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
- Data at inchem.org
- MSDS at Fischer Scientific