Supplier Page from Thermo Fisher Scientific for 1-Nitroso-2-naphthol-3,6-disulfonic acid, disodium salt hydrate, pure, indicator grade
1-Fluoro-2-nitrobenzene, 99% from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Ethyl indole-2-carboxylate, 97% from Thermo Fisher Scientific
Ethyl pyruvate, 98% from Thermo Fisher Scientific