... -27-2 Appearance:yellow to brown powder Type:basic dye Auramine O, also called Basic yellow 2, Pyocatanium aureum, aizen auramine, Pyoktanin ... Yellow, Canary Yellow,Pyoktanin, or C.I. 41000, is a diarylmethane dye used ... paper; hemp and viscose . This can be used for coloring basic oil, fat, paint and prepared to colour lake and ink. ...