Supplier Page from Thermo Fisher Scientific for Copper foil, 0.1mm (0.004in) thick, Puratronic:r, 99.999% (metals basis)
Ethyl 3-hydroxybutyrate, 99% from Thermo Fisher Scientific
Ethyl cyanoacetate, 98+% from Thermo Fisher Scientific
Ethyl oxamate, 99% from Thermo Fisher Scientific
Ethylmercurithiosalicylic acid, sodium salt, 97.0-101.0% from Thermo Fisher Scientific