All arsenazo reagents are derivatives ofchromotropic acid (1) and various substitutes of phenolarsenic acid (2). Arsenazo forms coloured solutions with many elements; these solutions can be used for the photometric determination (arsenazo -I) of the elements. They form strong complexes with such elements as thorium, zirconium, and hafnium.
|Formula||(HO)2C10H3(SO3R)2N=NC6H4As(O)(OR)2, R = 3Na and 1H|
|Storage Conditions||Room temperature|
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