Supplier Page from Thermo Fisher Scientific for Sodium tetraborate, anhydrous, Puratronic:r, 99.998% (metals basis)
2-Ethoxyethyl ether, 98+%, extra pure from Thermo Fisher Scientific
4-Fluoroanisole, 99% from Thermo Fisher Scientific
Esculin hydrate, 97% from Thermo Fisher Scientific
Ethyl carbazate, 97% from Thermo Fisher Scientific