Quinalizarin

• Alizarinbordeaux
• Tetrahydroxyanthraquinone
• 1,2,5,8 - tetrahydroxy -anthraquinone

Dark red needles with green metallic luster

Fixed

> 275 ° C

• Insoluble in water, poor in ethanol
• Soluble in acetone, aqueous alkali solution of glacial acetic acid and sulfuric acid

Template: Infobox chemical / molecular formula search available

Quinalizarin is an organic chemical compound which belongs to the group of alizarin dyes, and thus the anthraquinones. It is used for the detection and for the colorimetric determination of beryllium, magnesium, boron, aluminum, gallium, indium, and fluorides, and was formerly used for dyeing cotton. Quinalizarin arises from alizarin by heating with fuming sulfuric acid and boric acid.