Nile red and Nile blue are highly fluorescent and photostable organic dyes from the benzo[a]phenoxazine family. They have been used as histological stains for imaging lysosomes and lipids in vitro. The dyes’ high quantum yields and solvent-dependent optical properties make them ideal scaffolds for the development of pH probes and local polarity indicators.
Nile Blue A (Nile blue sulfate) is used to differentiate melanins and lipofuscins. It is also useful for staining fats and preparation of an amperometric glucose sensor.
cystine orally as the sodium salt in doses of 1.0 to 4.0 grams for three