Supplier Page from Thermo Fisher Scientific for Tantalum foil, 0.025mm (0.001in) thick, 99.997% (metals basis)
Ethyl 4,4,4-trifluoroacetoacetate, 97% from Thermo Fisher Scientific
Ethyl 4-bromocrotonate, 75%, tech from Thermo Fisher Scientific
Ethyl isonipecotate, 98+% from Thermo Fisher Scientific
Ethylenediamine, 99% from Thermo Fisher Scientific