Supplier Page from Thermo Fisher Scientific for Zinc tungsten oxide, 99.9% (metals basis)
Esculin hydrate, 97% from Thermo Fisher Scientific
Ethyl 2-mercaptoacetate, 99% from Thermo Fisher Scientific
Ethylbenzene, 99.8%, pure from Thermo Fisher Scientific
Ethylenediaminetetraacetic acid, 99%, pure from Thermo Fisher Scientific