4- (4-Nitrophenylazo) resorcinol

4- (4-Nitrophenylazo) resorcinol is an azo purple dye used experimentally as a pH indicator, showing yellow when the pH value is lower than 11 and purple when the pH value is higher than 13. In slightly alkaline or alkaline environments, it also turns dark blue in the presence of magnesium salts. Azo Violet can also be used to test for the presence of ammonium ions. The color of the ammonium chloride or ammonium hydroxide solution will change depending on the concentration of azo violet used.

Product Specifications

CAS Number

[74-39-5]

Product Name Alternative

Azo Violet; Magneson I

UNSPSC

12171500

Hazard Statement

H315-H319

Target

Fluorescent Dye

Type

Dye Reagents

Related Pathways

Others

Field of Research

Others

Assay Protocol

https://www.medchemexpress.com/4-4-nitrophenylazo-resorcinol.html

Solubility

10 mM in DMSO

Smiles

OC1=CC=C(C(O)=C1)/N=N/C2=CC=C(C=C2)[N+]([O-])=O

Molecular Formula

C12H9N3O4

Molecular Weight

259.22

Precautions

P264-P280-P302+P352-P362+P364

References & Citations

[1]Namazi H, et al.In vitro photo-controlled drug release system based on amphiphilic linear-dendritic diblock copolymers; self-assembly behavior and application as nanocarrier. J Pharm Pharm Sci. 2011;14 (2) :162-80.