Supplier Page from Thermo Fisher Scientific for Nickel foil, 0.25mm (0.01in) thick, Puratronic:r, 99.994% (metals basis)
Estrone, 99+% from Thermo Fisher Scientific
Ethyl 4,4,4-trifluoroacetoacetate, 97% from Thermo Fisher Scientific
Ethyl benzoate, 99+% from Thermo Fisher Scientific
Ethylbenzene, 99.8%, pure from Thermo Fisher Scientific