Supplier Page from Thermo Fisher Scientific for Barium carbonate, Puratronic:r, 99.997% (metals basis)
Ergosterol, 98% from Thermo Fisher Scientific
Ethyl 2-oxocyclohexanecarboxylate, 95% from Thermo Fisher Scientific
Ethyl benzoate, 99+% from Thermo Fisher Scientific
Ethyl phenylpropiolate, 98% from Thermo Fisher Scientific