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Metal Indicator - 2-(5-Bromo-2-pyridylazo)-5-[N-N-propyl-N-(3-sulfopropyl)amino]phenol, disodium salt, dihydrate

5-Br-PAPS, a water-soluble derivative of 5-Br-PADAP, is a highly sensitive colorimetric reagent for zinc detection. This reagent forms a red chelate with zinc at pH 7.5-9.5
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