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ERIOCHROME BLUE BLACK B CAS3564-14-5Do the indicator of complexometric titration. When used with alcohol or aqueous solution, for the determination of calcium, magnesium, manganese, zinc and other metal ions, determination of the water hardness.
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NBT CAS 298-83-9Dehydrogenase and peroxidase substrate, it is also one of alkaline phosphatase substrate
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1-(2-THIAZOLYLAZO)-2-NAPHTHOL CAS1147-56-4Analytical Chemistry;Azo Compounds;Chelating Reagents;Naphthylazo Compounds