Supplier Page from Thermo Fisher Scientific for Niobium foil, 0.25mm (0.01in) thick, 99.97% (metals basis excluding Ta), Ta :<0.06%
2-Ethylaniline, 98% from Thermo Fisher Scientific
Epichlorohydrin, 99% from Thermo Fisher Scientific
Ethyl carbazate, 97% from Thermo Fisher Scientific
Iron(III) acetylacetonate, 99+% from Thermo Fisher Scientific