Supplier Page from Thermo Fisher Scientific for Copper foil, 0.025mm (0.001in) thick, Puratronic:r, 99.999% (metals basis)
Estrone, 99+% from Thermo Fisher Scientific
Ethyl butyrate, 99% from Thermo Fisher Scientific
Ethyl N-piperazinecarboxylate, 99% from Thermo Fisher Scientific
meso-Erythritol, 99% from Thermo Fisher Scientific