Supplier Page from Thermo Fisher Scientific for Praseodymium foil, 0.62mm (0.024in) thick, 99.5% (REO)
1-Fluoro-4-nitrobenzene, 99% from Thermo Fisher Scientific
2-Ethoxyethyl ether, 98+%, extra pure from Thermo Fisher Scientific
Ergosterol, 98% from Thermo Fisher Scientific
Ethyl oxalyl chloride, 98% from Thermo Fisher Scientific