Supplier Page from Thermo Fisher Scientific for Phenylboronic acid, 98+%, may contain varying amounts of anhydride
Esculin hydrate, 97% from Thermo Fisher Scientific
Ethyl (ethoxymethylene)cyanoacetate, 98% from Thermo Fisher Scientific
Ethylmercurithiosalicylic acid, sodium salt, 97.0-101.0% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific