20815-67-2

Basic information

• Product Name: 4-(p'-methoxyphenylazo)pyridine
• Synonyms: 4-(p'-methoxyphenylazo)pyridine
• CAS NO: 20815-67-2
• Molecular Weight: 213.239
• Mol File: 20815-67-2.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: 4-(p'-methoxyphenylazo)pyridine(CAS DataBase Reference)
• NIST Chemistry Reference: 4-(p'-methoxyphenylazo)pyridine(20815-67-2)
• EPA Substance Registry System: 4-(p'-methoxyphenylazo)pyridine(20815-67-2)

Safety Data

• Hazardous Substances Data: 20815-67-2(Hazardous Substances Data)

Upstream product

• 67-56-1 methanol 
• 20815-66-1 4-(2-(pyridin-4-yl)diazenyl)phenol 
• 77-78-1 dimethyl sulfate 
• 504-24-5 4-aminopyridine 
• 100-17-4 para-methoxynitrobenzene 

Downstream Products

• 20815-66-1 4-(2-(pyridin-4-yl)diazenyl)phenol 
• 86427-50-1 4-((4-Hydroxyphenyl)diazenyl)-1-methylpyridin-1-ium iodide 
• 111317-33-0 4-(p-methoxyphenylazo)pyridinium methiodide 

Relevant articles and documents

A photoswitchable bis-azo derivative with a high temporal resolution

The novel photoswitchable bis-azo derivative reported herein shows a high temporal resolution of 2 × 108 times between the thermal relaxation rates of its two constituting photochromes. Moreover, the slow and fast azo building blocks of this molecular construct can be triggered by using UV and visible light, respectively.

STUDIES OF AZOXY DYESTUFFS-16 INVESTIGATIONS OF THE PROTONATION AND TAUTOMERIC EQILIBRIA OF 4-(p'-HYDROXYPHENYLAZO)PYRIDINE AND RELATED SUBSTRATES

A study of the protolytic equlibria undergone by the title compound 1 and the related substrates 2-4 has been carried out by spectrophotometric methods.Compound 1 is associated with two macroscopic protolytic equilibrium constants (pKa1=7.73, pKa1=4.65) while compounds 2, 3 and 4 are associated with a single protolytic equilibrium in each case (pKa2=6.31, pka3=6.31, pka4=4.53).Compounds 2 and 3 exhibit identical spectral behaviour as function of pH, which provides clues to interpretation of the equilibria involved in this series.Further consideration of possible protolytic and tautomeric equilibria (Schemes 1-3) has allowed the various microscopic equilibrium constants to be assigned, the first intance in the hydroxyphenylazopyridine series.It is concluded that hydrazone tautomeric forms are not important in these systems.The equilibrium between the neutral (HA) and zwitterionic (AH+/-) forms of 1 is predominantly on the former side, whereas the equlibrium between 4-hydroxypiridine and 4-pyridone greatly favours the latter form.Discussion of various eqilibrium contants is given in terms of structural and electronic effects.