AbFluor™ dyes are a series of highly water-soluble fluorescent dyes spanning the visible and near-infrared spectrum for Labeling biomolecules, especially proteins and nucleic acids. AbFluor™ dyes bear the core structures of different fluorescent dye core structures that cover the fluorescence spectrum from UV to NIR. Innovative modifications to the core structure makes AbFluor™ dyes superior to other commercial dyes with many innovative novel features. AbFluor™ 594 is the brightest deep red dye with the ?Ex/?Em of 593/614 nm, extremely photostable, which is super alternative to DyLight 594, Alexa Fluor 594. It yields the brightest antibody conjugates among spectrally similar dyes.