Ready to use. Biomol F-BLUE is a non-mutagenic fluorescent reagent that produces instant visualization of DNA bands upon Blue Light (LEDs producing a narrow emission peak centered at about 470 nm) or UV illumination of agarose gels. Supplied in Biomol"s 6X DNA Loading Buffer, Biomol F-BLUE is used to prepare DNA markers and samples for loading on agarose or polyacrylamide gels. Biomol F-BLUE is the most sensitive stain available for detecting double-stranded DNA (dsDNA). It contains three tracking dyes (Bromophenol Blue, Xylene Cyanol FF, and Orange G) for visually tracking the DNA migration during the electrophoresis process. It is ideal for the environment requiring a safe , non-hazardous alternative to Ethidum Bromide.