Supplier Page from Thermo Fisher Scientific for 4-Nitrophenol, 99%
D-Sorbitol, 97% from Thermo Fisher Scientific
Imidazole, 99% from Thermo Fisher Scientific
L(-)-Menthol, 99.5% from Thermo Fisher Scientific
L(+)-Lysine monohydrochloride, 99% from Thermo Fisher Scientific