Supplier Page from Thermo Fisher Scientific for Iodine, 0.1 N standard solution
2-Mercapto-1-methylimidazole, 98% from Thermo Fisher Scientific
D(+)-Melibiose monohydrate, 99+% from Thermo Fisher Scientific
Methyl chloroformate, 99% from Thermo Fisher Scientific
Semicarbazide hydrochloride, 99+% from Thermo Fisher Scientific