Supplier Page from Thermo Fisher Scientific for Boron tribromide, 1M solution in methylene chloride, AcroSeal®
4-Ethylresorcinol, 98% from Thermo Fisher Scientific
Esculin hydrate, 97% from Thermo Fisher Scientific
Ethyl 2-hydroxyethyl sulfide, 98% from Thermo Fisher Scientific
Ethyl chloroacetate, 99% from Thermo Fisher Scientific