Supplier Page from Thermo Fisher Scientific for Ammonium hydroxide, ACS reagent, 28-30% solution in water
Ethanethiol, 99+% from Thermo Fisher Scientific
Ethyl (ethoxymethylene)cyanoacetate, 98% from Thermo Fisher Scientific
Ethyl phenylcyanoacetate, 97% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific