DiOC6(3) (3,3'-Dihexyloxacarbocyanine Iodide)

DiOC₆(3) is a cell-permeant, green-fluorescent, lipophilic dye that is selective for the mitochondria of live cells, when used at low concentrations. At higher concentrations, the dye may be used to stain other internal membranes, such as the endoplasmic reticulum.