Nile Blue sulfate excellent quality manufacturer, exporter and supplier . Nile Blue sulfate is a highly fluorescent dye which has been found to lase in the 670-740 nm region. Nile Blue A is used to differentiate melanins and lipofuscins. Also useful for staining fats. Used in the preparation of an amperometric glucose sensor. Nile Blue Sulfate is a basic oxazine dye which is soluble in water and ethyl alcohol .