Supplier Page from Thermo Fisher Scientific for Niobium slug, 3.175mm (0.125in) dia x 6.35mm (0.25in) length, 99.95% (metals basis excluding Ta)
Ergosterol, 98% from Thermo Fisher Scientific
Ethyl N-piperazinecarboxylate, 99% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific
N-Ethylaniline, 98% from Thermo Fisher Scientific