1,1'-Dibutyl-3,3,3',3'-tetramethyl indocarbocyanine iodide

DiIC4(3) is a fluorescent carbocyanine dye with butyl chains widely used for membrane staining due to its hydrophobic nature, which helps it intercalate well into lipid bilayers. Carbocyanine dyes are unique organic molecules that contain a conjugated electron-deficient system between two heterocyclic nitrogen atoms that provides characteristically long absorption and emission wavelengths. It can be used for cell tracking as it is stably retained in membranes and in fixed tissue slices for anterograde and retrograde tracing. Spectral Data: Excitation max: ~550-555nm, Emission max: ~565-570nm (accord. Lit). Also used as intermediate for the synthesis of selective protein arginine methyltransferases (PRMT) inhibitors. Intermediate for the synthesis of fluorescent probes.