Supplier Page from Thermo Fisher Scientific for Selenium shot, amorphous, 1-6mm (0.04-0.24in), Puratronic, 99.999+% (metals basis)
3-Fluorobenzaldehyde, 98+% from Thermo Fisher Scientific
Ethylene carbonate, 99+% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific