4-(4-Nitrophenylazo)resorcinol (Synonyms: Azo Violet; Magneson I)

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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.

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4-(4-Nitrophenylazo)resorcinol Chemical Structure

CAS No. : 74-39-5

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Description	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.
Molecular Weight	259.22
Formula	C₁₂H₉N₃O₄
CAS No.	74-39-5
SMILES	OC1=CC=C(C(O)=C1)/N=N/C2=CC=C(C=C2)[N+]([O-])=O
Shipping	Room temperature in continental US; may vary elsewhere.
Storage	Please store the product under the recommended conditions in the Certificate of Analysis.
Purity & Documentation	Data Sheet (266 KB) Handling Instructions (2659 KB)
References	[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.

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The molarity calculator equation

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass		Concentration		Volume		Molecular Weight *
	=		×		×

The dilution calculator equation

Concentration _(start) × Volume _(start) = Concentration _(final) × Volume _(final)

This equation is commonly abbreviated as: C₁V₁ = C₂V₂

Concentration _(start)	×	Volume _(start)	=	Concentration _(final)	×	Volume _(final)
	×		=		×
C1		V1		C2		V2

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Do most proteins show cross-species activity?
Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

4-(4-Nitrophenylazo)resorcinol74-39-5Azo Violet Magneson IFluorescent DyeInhibitorinhibitorinhibit

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4-(4-Nitrophenylazo)resorcinol (Synonyms: Azo Violet; Magneson I)

4-(4-Nitrophenylazo)resorcinol Related Antibodies

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