Supplier Page from Thermo Fisher Scientific for 1-(2-Pyridylazo)-2-naphthol, 98%, pure, indicator grade
2-Ethylaniline, 98% from Thermo Fisher Scientific
4-Fluoroanisole, 99% from Thermo Fisher Scientific
Esculin hydrate, 97% from Thermo Fisher Scientific
Ethyl 3-aminobenzoate, 99+% from Thermo Fisher Scientific