Supplier Page from Thermo Fisher Scientific for Niobium slug, 6.35mm (0.25in) dia x 12.7mm (0.50in) length, 99.95% (metals basis excluding Ta)
2(2-Ethoxyethoxy)ethanol, 98+% from Thermo Fisher Scientific
2-Fluoroaniline, 99+% from Thermo Fisher Scientific
Ethyl chloroacetate, 99% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific