Supplier Page from Thermo Fisher Scientific for Nickel foil, 0.1mm (0.004in) thick, Puratronic:r, 99.994% (metals basis)
Ergosterol, 98% from Thermo Fisher Scientific
Estrone, 99+% from Thermo Fisher Scientific
Ethyl acrylate, 99.5%, stabilized from Thermo Fisher Scientific
Ethyl isonipecotate, 98+% from Thermo Fisher Scientific