Texas Red-X, SE is widely used in biological research as a fluorescent dye for labeling proteins, antibodies, and other biomolecules. Its high fluorescence intensity and photostability make it ideal for applications such as fluorescence microscopy, flow cytometry, and immunofluorescence assays. The dye is particularly useful for tracking cellular components, studying protein interactions, and visualizing specific targets in complex biological systems. Additionally, it is often employed in multiplexing experiments alongside other fluorophores due to its distinct emission spectrum, enabling simultaneous detection of multiple targets. Its succinimidyl ester (SE) group allows for efficient conjugation to primary amines, ensuring stable and specific labeling of biomolecules.