4-(4-Nitrophenylazo)resorcinol

SKU: orb2567227

Description

4-(4-Nitrophenylazo)resorcinol, also known as Azo Violet, is an azo purple dye used experimentally as a pH indicator, turning yellow below pH 11 and purple above pH 13. It becomes dark blue in slightly alkaline or alkaline environments with magnesium salts and can also test for ammonium ions, with the color changing based on the concentration of Azo Violet in ammonium chloride or ammonium hydroxide solutions.

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Key Properties

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CAS Number	74-39-5
MW	259.22
Formula	C₁₂H₉N₃O₄
SMILES	O=N(=O)C1=CC=C(N=NC2=CC=C(O)C=C2O)C=C1
Target	Others

Storage & Handling

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Storage	-20°C
Disclaimer	For research use only

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