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编 号：F199008
分子式：C20H12N2Na2O11S3
分子量：598.49
分子式：C20H12N2Na2O11S3
分子量：598.49
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CAS No: 165660-27-5
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Hydroxy naphthol blue disodium, an azo dye, is a metal indicator for calcium and a colorimetric reagent for alkaline earth metal ions ( λmax = 650 nm). In the pH range between 12 and 13, the solution of the indicator is reddish pink in the presence of calcium ion and to deep blue in the presence of disodium EDTA.
Hydroxy naphthol blue disodium, an azo dye, is a metal indicator for calcium and a colorimetric reagent for alkaline earth metal ions ( λmax = 650 nm). In the pH range between 12 and 13, the solution of the indicator is reddish pink in the presence of calcium ion and to deep blue in the presence of disodium EDTA.
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