Basic Red 28 is a fluorescent latent print dye used to stain cyanoacrylate developed latent prints. It can be used alone or mixed with Basic Yellow 40 to provide a wider range about 415nm of fluorescence. Shelf life of mixed solution is approximately six months and unmixed powder can be retained indefinitely. Both the powder and solution should be stored in a dark bottle. Mixed solution should be used in a fume hood or flammable liquids cabinet.