Solvent Violet 13, also known as D&C Violet No.2, oil violet, Solvent Blue 90, Alizarine Violet 3B, Alizurol Purple, Duranol Brilliant Violet TG, Ahcoquinone Blue IR base, Quinizarin Blue, Disperse Blue 72, and C.I. 60725, is a synthetic anthraquinonedye with bright bluish violet hue. It is a solid insoluble in water and soluble in acetone, toluene, and benzene. Its chemical formula is C21H15NO3, and its structure is 1-hydroxy-4-(p-tolylamino)anthraquinone, or 1-hydroxy-4-[(4-methylphenyl)amino]-9,10-anthracenedione or 1-hydroxy-4-(4-methylanilino)anthraquinone.
^Hans-Samuel Bien, Josef Stawitz, Klaus Wunderlich "Anthraquinone Dyes and Intermediates" Ullmann's Encyclopedia of Industrial Chemistry 2002 Wiley-VCH, Weinhem. doi:10.1002/14356007.a02_355