Supplier Page from Thermo Fisher Scientific for Hydrobromic acid, pure, ca. 48 wt% solution in water
4-Ethylaniline, 99+% from Thermo Fisher Scientific
Esculin hydrate, 97% from Thermo Fisher Scientific
Ethyl acrylate, 99.5%, stabilized from Thermo Fisher Scientific
meso-Erythritol, 99% from Thermo Fisher Scientific