CAS:128-70-1
Molecular formula:C30H14O2
Molecular weight:406.43
Properties: Dark orange powder. Insoluble in water, slightly soluble in ethanol, soluble in tetrahydronaphthalene and xylene. It is dark blue in concentrated sulfuric acid and produces yellow brown precipitation after dilution. It is blue red in alkaline sodium hydroxide reducing solution and orange in acid solution.
Application: Vat orange 9 is used for dyeing cotton, viscose, silk and Uygur cotton and printing of cotton. It has good levelness and affinity.
Structure: