Supplier Page from Thermo Fisher Scientific for Tantalum slug, 6.35mm (0.25in) dia x 12.7mm (0.50in) length, 99.98% (metals basis)
Ergosterol, 98% from Thermo Fisher Scientific
Ethyl 3-aminobenzoate, 99+% from Thermo Fisher Scientific
Ethylenediamine, 99% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific