CF™568 hydrazide is a superior red fluorescent dye with a hydrazide reactive group. CF™568 dye is much brighter and more photostable than Alexa Fluor® 568, making it the best red dye for fluorescence detection using the 568 nm excitation line of the Ar-Kr mixed-gas laser. Our CF™ dye hydrazides are bright, extremely water-soluble and nontoxic. These properties make the dyes excellent fixable polar tracers for neurons, or for gap junction studies. The dyes can be introduced into cells by microinjection. Hydrazides also can be used for labeling aldehyde or ketone groups, such as carbohydrate molecules after peroxidation with periodate. However, for this application we recommend using CF™ dye aminooxy forms, which are more reactive toward these groups than hydrazide forms.Compatible with the NucleoCounter® NC-3000™.