LDS-751 is a specialty chemical used as a fluorescent dye in biological research, particularly for cell staining and flow cytometry. It is highly effective for labeling nucleic acids, especially DNA, in live and fixed cells. Its ability to bind to DNA makes it a valuable tool for cell cycle analysis, allowing researchers to distinguish between different phases of the cell cycle based on fluorescence intensity. Additionally, LDS-751 is employed in cell viability assays, where it can help differentiate live and dead cells, as dead cells with compromised membranes often exhibit brighter staining due to increased dye uptake. Its red fluorescence emission (excitation ~543 nm, emission ~712 nm) makes it suitable for multicolor experiments, enabling simultaneous detection with other fluorophores. This dye is also utilized in studies involving apoptosis, cell sorting, and other cellular processes where DNA quantification and visualization are critical.