Alizarine Yellow R
![](/Images/godic/202412/18/Alizarin-yellow-R-1718-34-9-sodium-salt-2D-skeletal1651.png")
![Space-filling model of Alizarine Yellow R as a sodium salt](/Images/godic/202412/18/Alizarine-Yellow-R-sodium-3D-spacefill1651.png")
![](/Images/godic/202412/18/Alizarin-yellow-R-2243-76-7-acid-2D-skeletal1651.png")
Alizarine Yellow R is a yellow colored azo dye made by the diazo coupling reaction. It usually comes as a sodium salt. In its pure form it is a rust-colored solid. Its main use is as a pH indicator.
Alizarine Yellow R
英语百科
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