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Disperse Yellow 7

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Identification
Molecular formula
C18H14N2O2
CAS number
2832-40-8
IUPAC name
4-phenylazobenzene-1,3-diol
State
State

At room temperature, 4-phenylazobenzene-1,3-diol is in a solid state. It forms crystalline structures that are stable under normal handling and storage conditions. The compound may transition to other states upon heating.

Melting point (Celsius)
208.00
Melting point (Kelvin)
481.15
Boiling point (Celsius)
533.00
Boiling point (Kelvin)
806.15
General information
Molecular weight
259.32g/mol
Molar mass
259.2800g/mol
Density
1.3100g/cm3
Appearence

4-Phenylazobenzene-1,3-diol typically appears as a yellow to orange crystalline powder. It is known for its vivid color caused by the azo linkage (–N=N–), which is responsible for its application in dyeing processes. The compound's structure allows it to interact strongly with visible light, contributing to its intense coloration.

Comment on solubility

Solubility of 4-phenylazobenzene-1,3-diol

When discussing the solubility of 4-phenylazobenzene-1,3-diol, it is essential to consider several factors that influence its behavior in various solvents:

  • Polarity: The presence of hydroxyl (-OH) groups in this compound generally enhances its solubility in polar solvents, such as water, due to hydrogen bonding.
  • Aromatic Nature: The phenyl groups tend to promote solubility in non-polar solvents, making 4-phenylazobenzene-1,3-diol more soluble in organic solvents like ethanol and dichloromethane.
  • Temperature Effects: Solubility can increase with temperature; thus, heating may enhance the dissolution process, especially in solid-state forms.
  • pH Influence: Changes in the pH of the solution can affect the ionization of the hydroxyl groups, further influencing solubility patterns.

Overall, 4-phenylazobenzene-1,3-diol demonstrates a dual nature in solubility, favoring both polar and non-polar solvents under different conditions. As noted, "the solubility of a compound is often a balance between its polar and non-polar characteristics." Understanding these elements is crucial for effective application in various chemical processes.

Interesting facts

Interesting Facts About 4-Phenylazobenzene-1,3-diol

4-Phenylazobenzene-1,3-diol is a fascinating compound with intriguing applications and properties that capture the interest of both chemists and industrial scientists alike. Here are some key highlights:

  • Chemical Structure: This compound features an azo group, –N=N–, connecting two phenyl rings, along with hydroxyl groups positioned on the benzene ring. This structural arrangement contributes to its unique reactivity and usability in various chemical reactions.
  • Colorimetric Applications: The presence of the azobenzene moiety gives this compound distinct optical properties, making it useful in colorimetric analysis. It can readily undergo reversible transformation between different forms, which is particularly valuable in sensing applications.
  • Potential Use in Dyes: Due to the stability of the azo group, 4-phenylazobenzene-1,3-diol is explored as a dye intermediate. Its ability to form vivid colors allows for its consideration in dye manufacturing for textiles and other materials.
  • Photochemical Properties: This compound is known for its photochemical behavior. Exposure to light can induce isomerization, leading to structural changes that may impact its chemical reactivity and functionality in various applications.
  • Antioxidant Activity: Emerging research indicates that derivatives of 4-phenylazobenzene-1,3-diol may exhibit antioxidant properties, raising potential for applications in health and cosmetics industries.

In summary, 4-phenylazobenzene-1,3-diol stands out not merely as a chemical substance, but as a compound brimming with possibilities. As chemists continue to explore its properties, we may uncover even more innovative uses that enhance our understanding and interaction with the chemical world. The quote by Linus Pauling resonates well here: "The best way to have a good idea is to have lots of ideas." This compound certainly encourages a wealth of ideas in research and application!

Synonyms
2,4-Dihydroxyazobenzene
4-(PHENYLAZO)RESORCINOL
1,3-Benzenediol, 4-(phenylazo)-
1,3-Benzenediol, 4-(2-phenyldiazenyl)-
Sudan Orange G
2051-85-6
Solvent orange 1
Benzeneazoresorcinol
C.I. Solvent Orange 1
Ceres Orange G
Ceres Orange GN
Sudan Yellow AR
Resinol Orange G
Fat Orange A
Fat Orange GS
Fat Orange RG
Cerisol Yellow GR
Grasol Yellow RSF
Organol Orange 2J
Tertrogras Orange SG
Fat Victoria Yellow D
1504 Yellow
C.I. Food Orange 3
p-Phenylazoresorcinol
2,4-Dibenzeneazoresorcinol
Yellow M Soluble in Grease
Lacquer Orange V 3G
Resorcinol, 4-(phenylazo)-
Plastoresin Orange F 3A
CI 11920
4-Phenylazoresorcinol
Oranz potravinarska 3
C.I. 11920
Oranz rozpoustedlova 1
NSC 7949
JR7B69ZW9B
(E)-4-(phenyldiazenyl)benzene-1,3-diol
96627-69-9
4-phenyldiazenylbenzene-1,3-diol
NSC-7949
MFCD00002275
Sudan Orange G (~85%)
Food Orange 3
Oranz potravinarska 3 [Czech]
Oranz rozpoustedlova 1 [Czech]
EINECS 218-131-9
UNII-JR7B69ZW9B
BRN 0958430
AI3-08923
(4E)-3-hydroxy-4-(2-phenylhydrazin-1-ylidene)cyclohexa-2,5-dien-1-one
4-(Phenylazo)-1,3-benzenediol
SOG
Lacquer Orange V3G
Sudan Orange G (C.I. 11920)
Plastoresin Orange F3A
starbld0000655
4-(2-phenyldiazen-1-yl)benzene-1,3-diol
SCHEMBL80799
4-16-00-00264 (Beilstein Handbook Reference)
SCHEMBL341192
DTXSID9062146
NSC7949
PULNESMFDLBKAZ-KAMYIIQDSA-N
PULNESMFDLBKAZ-SDNWHVSQSA-N
Sudan Orange G, analytical standard
CCG-46686
Sudan Orange G, Dye content 85 %
Sudan Orange G, >=97% (HPLC)
AKOS000121075
AKOS030241188
AKOS037955973
4-(Phenyldiazenyl)-1,3-benzenediol #
HY-119987
CS-0078870
NS00046470
2051-85-6y
1,3-BENZENEDIOL, 4-(PHENYLAZO)-, (E)-
SR-01000636365-1
Q27281644