Supplier Page from Thermo Fisher Scientific for 1-(4-Nitrophenylazo)-2-naphthol
3-Methoxybenzyl alcohol, 98% from Thermo Fisher Scientific
4-Aminophenylacetic acid, 98% from Thermo Fisher Scientific
8-Hydroxyquinoline, ACS reagent from Thermo Fisher Scientific
Hydroquinone, 99% from Thermo Fisher Scientific