Supplier Page from Thermo Fisher Scientific for Niobium powder, -325 mesh, Puratronic:r, 99.99% (metals basis excluding Ta), Ta :<500ppm
DL-Ethyl 2-bromopropionate, 99% from Thermo Fisher Scientific
Ethanethiol, 99+% from Thermo Fisher Scientific
Ethyl oxalyl chloride, 98% from Thermo Fisher Scientific
N-Ethylaniline, 98% from Thermo Fisher Scientific