Supplier Page from Thermo Fisher Scientific for Zinc slug, 6.35mm (0.25in) dia x 6.35mm (0.25in) length, Puratronic:r, 99.993% (metals basis)
Dotriacontane, 97% from Thermo Fisher Scientific
Ethyl cyanoacetate, 98+% from Thermo Fisher Scientific
Ethyl isonipecotate, 98+% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific