Supplier Page from Thermo Fisher Scientific for Praseodymium foil, 0.1mm (0.004in) thick, 99% (REO)
4-Fluorobenzyl chloride, 98% from Thermo Fisher Scientific
Ergosterol, 98% from Thermo Fisher Scientific
Ethyl 4-dimethylaminobenzoate, 99+% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific