CytoTrace™ Red CMTPX is a fluorogenic dye used as a long-term cell tracer. It is nonfluorescent but cell-permeant and, upon entering the cell, is converted to a fluorescent compound in the cytosol. CytoTrace™ Red CMTPX is retained by living cells and displays excitation/emission spectra of 577/602 nm, respectively. It remains fluorescent for at least 72 hours and is retained through cell division for several cycles.WARNING This product is not for human or veterinary use.