This tracer will label both myelinated fibers and amyloid plaques. Although it has been available for over a year, it has not been extensively used, possibly because it differs from most of the other tracers that target A-beta aggregates. By contrast, Euro-Glo is thought to label glycolipids, such as gangliosides, resulting in a different labeling pattern. The relatively long staining times (5-7 days) required may be less convenient than more rapid stains such as Amylo-Glo. This compound represents the only histochemical stain for use labeling brain tissue sections whose fluorescence is based on the presence of a rare earth metal (Europium) as opposed to an organic fluorophore.