Supplier Page from Thermo Fisher Scientific for Buffer solution, pH 4.00 (µ+0.01 @ 25µoC), Colored Red, Specpure:r, NIST Traceable
2(2-Ethoxyethoxy)ethanol, 98+% from Thermo Fisher Scientific
Ethyl acrylate, 99.5%, stabilized from Thermo Fisher Scientific
Fluorescein isothiocyanate isomer I, 90%, pure from Thermo Fisher Scientific
Iron(III) acetylacetonate, 99+% from Thermo Fisher Scientific