Skip to main content

Congo Red

ADVERTISEMENT
Identification
Molecular formula
C32H22N6Na2O6S2
CAS number
573-58-0
IUPAC name
3-[[4-[4-(2,4-diamino-5-methyl-phenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonic acid
State
State
Solid at room temperature. It is typically in the form of a sodium salt, making it water-soluble.
Melting point (Celsius)
360.00
Melting point (Kelvin)
633.00
Boiling point (Celsius)
400.00
Boiling point (Kelvin)
673.00
General information
Molecular weight
696.67g/mol
Molar mass
696.6650g/mol
Density
0.9950g/cm3
Appearence

Congo Red appears as a red-brown colored powder or solid that dissolves in water to give a red-colored solution. In aqueous solution, it exhibits a color change from blue to red with pH values ranging from pH 3.0 to pH 5.2.

Comment on solubility

Solubility of 3-[[4-[4-(2,4-diamino-5-methyl-phenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonic acid

The solubility of 3-[[4-[4-(2,4-diamino-5-methyl-phenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonic acid is influenced by several factors due to its complex molecular structure. This compound contains multiple functional groups, including sulfonic acid groups, which generally increase its water solubility. However, due to its large hydrophobic phenyl rings, there may be significant challenges in solvation.

Here are some key points regarding its solubility:

  • Water Solubility: Compounds with sulfonic acid groups are often more soluble in water due to their ability to interact favorably with water molecules.
  • Organic Solvents: The presence of hydrophobic aromatic rings may limit solubility in organic solvents unless specific interactions are accounted for.
  • pH Dependence: The solubility may vary with pH, as the protonation state of the sulfonic acid groups will affect the overall charge and hydrophilicity of the compound.
  • Temperature Effects: Higher temperatures typically enhance solubility, but the stability of this chemical structure under heat must be considered.

In conclusion, while the compound could exhibit good solubility in aqueous solutions due to its sulfonic acid functionality, the analysis of its solubility in various solvents requires careful consideration of its overall molecular architecture and environmental conditions. It is essential to conduct empirical studies to fully understand the solubility behavior of this specific compound in practical applications.

Interesting facts

Interesting Facts about 3-[[4-[4-(2,4-diamino-5-methyl-phenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonic acid

This compound, often abbreviated as a dye or pigment due to its complex structure, possesses fascinating properties and applications, particularly in the field of chemistry and materials science.

Structural Significance

The intricate structure of this compound features several key components:

  • Azo Groups: The presence of azo groups (-N=N-) contributes to the compound's vibrant color, making it useful in various dyeing applications.
  • Hydrazono and Imino Functions: These functional groups enhance the reactivity of the compound, allowing for versatile chemical interactions.
  • Sulfonic Acid Groups: The sulfonic acid moieties increase water solubility, making the compound suitable for applications in aqueous environments.

Applications

Due to its unique properties, this compound is employed in various fields:

  • Dyes and Pigments: It is widely used in the textile industry for dyeing fabrics, providing striking colors and excellent colorfastness.
  • Biological Research: The compound can serve as a staining agent in biological assays, helping scientists visualize structures under a microscope.
  • Material Science: Its complex structure allows it to be used in creating polymers with enhanced properties.

Research and Development

The study of this compound opens avenues for research in:

  • Novel Applications: Ongoing research may reveal new uses in fields ranging from biochemistry to nanotechnology.
  • Environmental Impact: Investigating the biodegradability and environmental safety of such compounds is crucial in today's rapidly evolving landscape.

Quote: "The beauty of chemistry lies not just in the compounds themselves, but in the endless possibilities they offer for innovation and discovery!"

In conclusion, 3-[[4-[4-(2,4-diamino-5-methyl-phenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonic acid is a remarkable compound that bridges the gap between synthetic chemistry and practical applications, showcasing the elegance of chemical structures and their potential in diverse fields.