Supplier Page from Aladdin Scientific Corporation for Yellow Hue standard colorimetric solution（Y）
(1R,2R)-(+)-1,2-Diphenylethylenediamine from Aladdin Scientific Corporation
1H-Pyrrolo[3,2-d]pyrimidine-2,4(3H,5H)-dione from Aladdin Scientific Corporation
6-Amino-5-iodonicotinic acid from Aladdin Scientific Corporation
Sodium iodide from Aladdin Scientific Corporation