Chrysoine resorcinol
（重定向自Resorcinol yellow）
![Skeletal formula of chrysoine resorcinol as a sodium salt](/Images/godic/202502/07/Chrysoine_resorcinol.svg4051.png")
![Space-filling model of chrysoine resorcinol as a sodium salt](/Images/godic/202502/07/Chrysoine_resorcinol_sodium_3D_spacefill4051.png")
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.