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PAN (1-(2-Pyridylazo)-2-naphthol)

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Identification
Molecular formula
C15H11N3O
CAS number
85-85-8
IUPAC name
1-(2-pyridylazo)naphthalen-2-ol
State
State

At room temperature, PAN is found in a solid state as a crystalline powder.

Melting point (Celsius)
138.00
Melting point (Kelvin)
411.00
Boiling point (Celsius)
378.80
Boiling point (Kelvin)
651.80
General information
Molecular weight
261.27g/mol
Molar mass
261.2800g/mol
Density
1.3940g/cm3
Appearence

PAN appears as an orange to red crystalline powder. It is known for its intense color, which is useful in various analytical chemistry applications, particularly in the formation of colored complexes with metals. The compound is relatively stable under normal conditions but should be protected from excessive light and heat to prevent degradation.

Comment on solubility

Solubility of 1-(2-pyridylazo)naphthalen-2-ol

The solubility of 1-(2-pyridylazo)naphthalen-2-ol can be an intriguing aspect due to its complex structure and functional groups. Here are some important points to consider:

  • Polar vs Nonpolar: The compound contains both polar and nonpolar regions which can influence its solubility in various solvents.
  • Common Solvents: It is generally soluble in organic solvents such as ethanol and dichloromethane, but may have limited solubility in water.
  • pH Dependence: The solubility may vary with pH levels, particularly because of the azo group which can engage in protolysis under certain conditions.
  • Impurities: The presence of impurities or other chemical species can also affect its solubility; therefore, a purified form will likely display different solubility characteristics.

It is crucial to note that understanding the solubility of this compound can help in predicting its behavior in different chemical environments and applications. The balance between its hydrophobic and hydrophilic interactions is key to determining exactly how it can be utilized.

Interesting facts

Interesting Facts about 1-(2-pyridylazo)naphthalen-2-ol

1-(2-pyridylazo)naphthalen-2-ol, often abbreviated as PAN, is a fascinating compound in the world of analytical chemistry. It's primarily known for its use as a dye in various chemical analyses.

Key Features of 1-(2-pyridylazo)naphthalen-2-ol:

  • Applications: PAN serves as a reagent for the spectrophotometric determination of metals, such as copper and nickel.
  • Color Change: One of the most striking features of PAN is its ability to change color based on the pH of the solution, which makes it a valuable indicator in titrations.
  • Coordination Chemistry: This compound forms stable chelates with various metal ions, enhancing its utility in complexometric titrations.
  • Synthesis: The synthesis of PAN typically involves a condensation reaction between 1-naphthol and 2-pyridinecarboxaldehyde, showcasing the versatility of organic synthesis techniques.

Quote from a chemical journal: "The ability of 1-(2-pyridylazo)naphthalen-2-ol to form chelate complexes renders it an indispensable tool in metal ion detection and analysis." This demonstrates its significance in both educational and research settings, emphasizing the compound's place in the chemical community.

Moreover, due to its unique structure, PAN has become a subject of interest in research focusing on new materials and sensors. As scientists continue to explore and innovate, compounds like 1-(2-pyridylazo)naphthalen-2-ol reveal much about the dynamic interplay between molecular structure and functionality.

Synonyms
1-(2-Pyridylazo)-2-naphthol
85-85-8
PAN (indicator)
1-(Pyridin-2-yldiazenyl)naphthalen-2-ol
2-Naphthalenol, 1-(2-pyridinylazo)-
2-Naphthol, 1-(2-pyridylazo)-
1-(2-Pyridylazo)-2-hydroxynaphthalene
2-Hydroxy-1-(2-pyridylazo)naphthalene
1-(Pyridin-2-azo)-2-naphthol
MFCD00004071
UNII-095B53Y3XV
095B53Y3XV
NSC 5332
NSC-5332
EINECS 201-637-9
1-(pyridin-2-yldiazenyl)-2-naphthol
MLS000540127
DTXSID5058933
1-(2'-pyridylazo)-2-naphthol
1-(2-PYRIDYLAZO)NAPHTHOL-2
SMR000162402
PYRIDINE, 2-(2-HYDROXY-1-NAPHTHYLAZO)-
2-HYDROXY-1-(PYRIDIN-2-YLDIAZENYL)NAPHTHALENE
1-[(1E)-2-(pyridin-2-yl)diazen-1-yl]naphthalen-2-ol
23299-85-6
PAN (VAN)
1-[2-(1H-pyridin-2-ylidene)hydrazin-1-ylidene]naphthalen-2-one
PAN reagent
1(Pyridin2azo)2naphthol
PAN [MI]
1.2-Pyridylazo-2-naphthol
2Naphthol, 1(2pyridylazo)
SCHEMBL272188
(1Z)-1-(pyridin-2-ylhydrazinylidene)naphthalen-2-one
SCHEMBL4947540
CHEMBL1400298
DTXCID6048460
SCHEMBL11882710
SCHEMBL11882717
BDBM48080
cid_5359275
2Naphthalenol, 1(2pyridinylazo)
NSC5332
1(2Pyridylazo)2hydroxynaphthalene
2Hydroxy1(2pyridylazo)naphthalene
CHEBI:194272
LLYOXZQVOKALCD-UHFFFAOYSA-N
HMS2310J23
HY-D0223
2Naphthol, 1(2pyridylazo) (8CI)
CCG-49495
STL453606
AKOS004901457
AKOS028109811
1-(2-pyridin-2-yldiazenyl)-2-naphthol
2-Naphthol, 1-(2-pyridylazo)-(8CI)
NCGC00247231-01
2Naphthalenol, 1(2(2pyridinyl)diazenyl)
AS-59143
DB-018463
1-[(E)-2-Pyridinyldiazenyl]-2-naphthol #
A5000
CS-0010135
NS00041152
(1Z)-1-(2-pyridylhydrazono)naphthalen-2-one
1-(2-Pyridylazo)-2-naphthol, indicator grade
1-[(E)-pyridin-2-yldiazenyl]naphthalen-2-ol
D88559
2-Naphthalenol, 1-(2-(2-pyridinyl)diazenyl)-
AN-652/40913915
Q3596751
SR-01000638946-1
(1Z)-1-(2-pyridinylhydrazinylidene)-2-naphthalenone
1-(2-Pyridylazo)-2-naphthol, for spectrophotometric det. of metal ions, >=97.0%
201-637-9