Supplier Page from Aladdin Scientific Corporation for Potassium phosphate buffer
4-Nitrophenyl hepta-O-acetyl-1-thio-β-lactoside from Aladdin Scientific Corporation
Citric acid monohydrate from Aladdin Scientific Corporation
Ethyl cis-2-Isothiocyanato-1-Cyclohexanecarboxylate from Aladdin Scientific Corporation
pH Buffer Standard Solution(pH=4.01) from Aladdin Scientific Corporation