Supplier Page from Thermo Fisher Scientific for Ammonium hydroxide, ACS reagent, 28-30% solution in water
4-Ethylaniline, 99+% from Thermo Fisher Scientific
4-Fluoroanisole, 99% from Thermo Fisher Scientific
Esculin hydrate, 97% from Thermo Fisher Scientific
Ethanethiol, 99+% from Thermo Fisher Scientific