Rhubarb root dye for hair contains chrysophanic acid and Emodin. “Chrysophanic acid and Emodin are two anthraquinoid dyes that are present in the roots of Rhubarb. As a dye (Chrsophanic Acid) can be used to make yellow, orange and red shades with suitable mordants and is sometimes used as a dye for hair, since Chrysophanic … Continue reading Rhubarb Root