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)
1-Ethynyl-1-cyclohexanol, 99+% from Thermo Fisher Scientific
Ethyl 2-mercaptoacetate, 99% from Thermo Fisher Scientific
Ethyl chloroformate, 99% from Thermo Fisher Scientific
Eugenol, 99% from Thermo Fisher Scientific