Widely used in bioconjugation, Tex Red-X NHS enables fluorescent labeling of primary amines on proteins, peptides, and other biomolecules. Its high reactivity with amine groups allows for stable amide bond formation, making it ideal for preparing fluorescent probes for imaging applications. Commonly applied in fluorescence microscopy, flow cytometry, and immunoassays, it provides strong red fluorescence with excellent photostability. The dye is also suitable for labeling antibodies, streptavidin, and other detection reagents used in life science research. Its NHS ester chemistry ensures efficient labeling in aqueous or organic-aqueous buffers at near-neutral pH, facilitating straightforward experimental setup.