Supplier Page from Thermo Fisher Scientific for Niobium powder, -325 mesh, Puratronic:r, 99.99% (metals basis excluding Ta), Ta :<500ppm
2-Ethylhexanoic acid, 99% from Thermo Fisher Scientific
4-Ethylphenol, 97% from Thermo Fisher Scientific
Ethyl indole-2-carboxylate, 97% from Thermo Fisher Scientific
Ethyl N-piperazinecarboxylate, 99% from Thermo Fisher Scientific