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N-[Tris(hydroxymethyl)methyl]-3-amino-2-hydroxypropansulfonic acid CAS 68399-81-5It is used as a biological buffer
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2-Mercaptopyridine N-oxide sodium salt CAS 3811-73-2It is a bidentate complexing agent used to chelate transition metals at a pH range of 0.7-7.4
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Cholic acid CAS 81-25-4It is the main component of bile acid, insoluble in water, soluble in ethanol and acetic acid
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2,2'-Bipyridine-4,4'-dicarboxylic acid CAS 6813-38-3It is used as sensitizing dye ligand.
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Vitamin C CAS 50-81-7It is a naturally existed organic compound with antioxidant properties.