... :basic dye Auramine O, also called Basic yellow 2, Pyocatanium aureum, aizen auramine, Pyoktanin Yellow, Canary Yellow,Pyoktanin, or C.I. 41000, is ... fluorescent stain. In its pure form, Auramine O appears as yellow needle crystals. It is very soluble in water and soluble ... fastness .For bright color ,also used to fight the system of green or red. And also be used for stainning the ...