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219916

Sigma-Aldrich

Hydroxy naphthol blue disodium salt

ACS reagent

Synonym(s):

disodium;3-hydroxy-4-[(2-hydroxy-4-sulfonatonaphthalen-1-yl)diazenyl]-7-sulfonaphthalene-2-sulfonate

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About This Item

Linear Formula:
C20H12N2O11S3Na2
CAS Number:
165660-27-5
Molecular Weight:
598.49
MDL number:
MFCD00058506
UNSPSC Code:
12171500
PubChem Substance ID:
24853154
NACRES:
NA.47

grade

ACS reagent

Quality Level

200

form

powder, crystals or granules

pH

7.9

mp

274 °C

solubility

water: soluble

density

2.130 g/cm3

λmax

650 nm

suitability

passes test for determination of calcium

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

Oc1cc(c2ccccc2c1N=Nc3c(O)c(cc4cc(ccc34)S(=O)(=O)O[Na])S(=O)(=O)O[Na])S(O)(=O)=O

InChI

1S/C20H14N2O11S3.2Na/c23-15-9-16(35(28,29)30)13-3-1-2-4-14(13)18(15)21-22-19-12-6-5-11(34(25,26)27)7-10(12)8-17(20(19)24)36(31,32)33;;/h1-9,23-24H,(H,25,26,27)(H,28,29,30)(H,31,32,33);;/q;2*+1/p-2

InChI key

WPDDXLRAJOPBIR-UHFFFAOYSA-L

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General description

Hydroxy naphthol blue disodium salt is a chemical compound belonging to the class of azo dyes commonly used as a pH indicator.It exists as small blue crystals. Hydroxy naphthol blue is suitable for the quantification of metal leaching in metal affinity chromatography. It changes color at pH range 12-13 from blue to reddish pink, in the presence of calcium ions and to deep blue in the presence of disodium ethylenediaminetetraacetic acid (EDTA).

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H319

Hazard Classifications

Eye Irrit. 2

WGK

WGK 3

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