<unk>  is a staining agent used in diagnostic cytopathology and histopathology, typically for staining immature red blood cells. It is a supravital stain. It is closely related to<unk>  blue, an older stain in wide use.
New methylene blue
Azo dye
Gold salts
Bicarbonate buffer system
Methylene blue
Sodium hypochlorite
Chloroethane
Sodium thiosulfate 