<unk>  (also<unk>  is an organic compound of the thiazine class of heterocycles. It is used as a stain and as an antimicrobial agent. It is classified as an azine dye, and the chromophore is a cation, the anion is often unspecified.
New methylene blue
Azo dye
Gold salts
Bicarbonate buffer system
Methylene blue
Sodium hypochlorite
Chloroethane
Sodium thiosulfate 