Thiazole Orange Homodimer, 1 mM in DMSO

Thiazole orange homodimer (TOhD), also know as TOTO-1, is a cell-impermeant, high-affinity nucleic acid stain based upon a symmetric cyanine dye dimer that is essentially nonfluorescent in the absence of nucleic acids that exhibits excitation/emission maxima ~514/533 nm when bound to nucleic acids.