Supplier Page from Thermo Fisher Scientific for Nickel slug, 6.35mm (0.25in) dia x 6.35mm (0.25in) length, Puratronic:r, 99.995% (metals basis)
Esculin hydrate, 97% from Thermo Fisher Scientific
Ethyl 2-bromoisobutyrate, 98% from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Ethyl N-piperazinecarboxylate, 99% from Thermo Fisher Scientific