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114669

Sigma-Aldrich

4-(4-Nitrophenylazo)resorcinol

Dye content 90 %

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Synonym(s):
Azoviolet, Magneson I
Linear Formula:
O2NC6H4N=NC6H3-1,3-(OH)2
CAS Number:
Molecular Weight:
259.22
Beilstein/REAXYS Number:
674709
EC Number:
MDL number:
PubChem Substance ID:

form

powder

Quality Level

composition

Dye content, 90%

mp

195-200 °C (dec.) (lit.)

λmax

432 nm

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

Oc1ccc(\N=N\c2ccc(cc2)[N+]([O-])=O)c(O)c1

InChI

1S/C12H9N3O4/c16-10-5-6-11(12(17)7-10)14-13-8-1-3-9(4-2-8)15(18)19/h1-7,16-17H/b14-13+

InChI key

NGPGYVQZGRJHFJ-BUHFOSPRSA-N

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This Item
A8675A4043E4382
4-(4-Nitrophenylazo)resorcinol Dye content 90 %

114669

4-(4-Nitrophenylazo)resorcinol

Azure B certified by the Biological Stain Commission

A4043

Azure B

Eosin Y disodium salt certified by the Biological Stain Commission

E4382

Eosin Y disodium salt

application(s)

diagnostic assay manufacturing
hematology
histology

application(s)

diagnostic assay manufacturing
hematology
histology

application(s)

diagnostic assay manufacturing
hematology
histology

application(s)

diagnostic assay manufacturing
hematology
histology

composition

Dye content, 90%

composition

Dye content, ~90%

composition

Dye content, ≥89%

composition

Dye content, ≥90%

λmax

432 nm

λmax

-

λmax

-

λmax

-

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

storage temp.

room temp

storage temp.

room temp

storage temp.

room temp

storage temp.

room temp

Biochem/physiol Actions

4-(4-Nitrophenylazo) resorcinol, also known as azo violet or magneson I, is a red colored powder. It functions as a spot test reagent and forms blue lake on reaction with Mg(OH)2 in alkaline solution. It is mainly used for determining the presence of magnesium in the solution.
4-(4-Nitrophenylazo)resorcinol is a pH indicator.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

ppe

dust mask type N95 (US), Eyeshields, Gloves


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CRC Handbook of Organic Analytical Reagents (1992)
Cheng K L
CRC Handbook of Organic Analytical Reagents (1992)
R. Gopalan
Inorganic Chemistry for Undergraduates (2009)
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