Hydroxystilbamidine (also called Fluoro-Gold™) has been used extensively as a retrograde tracer for neurons and also a histochemical stain. Fluoro-Gold™ can undergo retrograde axonal transport, it shows extensive filling of dendrites, and has a high resistance to fading.    The 4% solution in deionized H2O is a convenient, ready-to-use form. If desired, the solution can be diluted to a lower concentration. For most applications, the typically dye concentration is 2% to 4%.    We also sell hydroxystilbamidine in solid form.    &lamba;Ex/&lamba;Em = 361/536 nm  Store at 4°C and protect from light  C18H24N4O7S2  MWt: 473  [223769-64-0]    Fluoro-Gold is a trademark of Fluorochrome, LLC.