Supplier Page from Thermo Fisher Scientific for Niobium foil, 0.127mm (0.005in) thick, annealed, 99.8% (metals basis)
2(2-Ethoxyethoxy)ethanol, 98+% from Thermo Fisher Scientific
Ethoxymethylenemalononitrile, 98% from Thermo Fisher Scientific
Ethylene carbonate, 99+% from Thermo Fisher Scientific
Ethyltriphenylphosphonium bromide, 98% from Thermo Fisher Scientific