Supplier Page from Thermo Fisher Scientific for Niobium slug, 6.35mm (0.25in) dia x 6.35mm (0.25in) length, 99.95% (metals basis excluding Ta)
4-Ethylphenol, 97% from Thermo Fisher Scientific
Eicosanoic acid, 98% from Thermo Fisher Scientific
Ethyl 3-aminobenzoate, 99+% from Thermo Fisher Scientific
Ethyl butyrylacetate, 98% from Thermo Fisher Scientific