Name:C.I.Solvent Blue 4 C.I.Solvent Blue 4,C.I.44045:1,CAS 6786-83-0,487.63,C33H33N3O,Oil Blue B,Oil Blue 101,Baso Blue 645,Blue B Base,Victoria Blue B Base Molecular Formula:C33H33N3O Molecular Weight: 487.63 CAS Registry Number:6786-83-0 Properties and Applications:brilliant blue. Soluble in water is blue, soluble in ethanol for blue. In concentrated sulfuric acid to red light brown, dilution after yellow to green and then to blue. Dye aqueous solution to join sodium hydroxide have dark red light brown precipitationStandardLight FastnessHeat-resistant(℃)waterSodium Carbonate(5%)Hydrochloric acid(5%)Melting pointStableISOPoor>180110InsolubleNo changeDissole