Supplier Page from Thermo Fisher Scientific for Nickel foil, 0.5mm (0.02in) thick, Puratronic:r, 99.994% (metals basis)
Ethyl 4-chlorobutyrate, 97% from Thermo Fisher Scientific
Ethyl butyrate, 99% from Thermo Fisher Scientific
Ethyl cyanoformate, 99% from Thermo Fisher Scientific
meso-Erythritol, 99% from Thermo Fisher Scientific