Supplier Page from Thermo Fisher Scientific for Niobium powder, APS 1-5 micron, 99.8% (metals basis)
1-Fluoro-2-nitrobenzene, 99% from Thermo Fisher Scientific
4-Ethylphenol, 97% from Thermo Fisher Scientific
Esculin hydrate, 97% from Thermo Fisher Scientific
Ethyl benzoate, 99+% from Thermo Fisher Scientific