Hydroxy naphthol blue (disodium) [165660-27-5]

MedChem Express

Hydroxy naphthol blue (disodium) [165660-27-5]

10

165660-27-5

Research Use Only

C20H12N2Na2O11S3

598.49

Hydroxy naphthol blue disodium, an azo dye, is a metal indicator for calcium and a colorimetric reagent for alkaline earth metal ions ( lambdamax = 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[1].

O=C1C=C(S(=O)(O)=O)C2=CC=CC=C2/C1=N/NC3=C(O)C(S(=O)(O[Na])=O)=CC4=CC(S(=O)(O[Na])=O)=CC=C43

2°C to 8°C

12162000