Hydroxy naphthol blue (disodium)

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[1].

Product Specifications

CAS Number

[165660-27-5]

UNSPSC

12171500

Hazard Statement

H302, H315, H319, H335

Target

Fluorescent Dye

Type

Dye Reagents

Related Pathways

Others

Field of Research

Others

Assay Protocol

https://www.medchemexpress.com/hydroxy-naphthol-blue-disodium.html

Solubility

DMSO : 5.83 mg/mL (ultrasonic; warming; heat to 60°C) |H2O : 25 mg/mL (ultrasonic)

Smiles

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

Molecular Formula

C20H12N2Na2O11S3

Molecular Weight

598.49

Precautions

H302, H315, H319, H335

References & Citations

[1]Motoki Goto, et al. Colorimetric detection of loop-mediated isothermal amplification reaction by using hydroxy naphthol blue. Biotechniques. 2009 Mar;46 (3) :167-72.