Merck, 39286-10MG-F, Hydroxystilbamidine bis(methanesulfonate)

Hydroxystilbamidine bis (methanesulfonate), also known as Fluoro-Gold, is a retrograde fluorescent tracer. Chemically, Hydroxystilbamidine is a weak base and can cross cell membranes in its uncharged form. A few properties of Hydroxystilbamidine bis (methanesulfonate) are: Intense Fluorescence. Extensive filling of dendrites. High Resistance to fading. No uptake by undamaged fibers. No diffusion from labelled cells. Highly compatible with other neuro-histochemical techniques.