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Congo Red

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Identification
Molecular formula
C32H22N6Na2O6S2
CAS number
573-58-0
IUPAC name
disodium;3-[[4-[4-(2,4-diamino-5-methyl-phenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonate
State
State
Solid at room temperature. It is usually handled as a powder.
Melting point (Celsius)
357.00
Melting point (Kelvin)
630.15
Boiling point (Celsius)
290.00
Boiling point (Kelvin)
563.15
General information
Molecular weight
696.67g/mol
Molar mass
696.6650g/mol
Density
1.0000g/cm3
Appearence

Congo Red is a benzidine-based anionic diazo dye. It appears as a red-brown powder when dry and forms a red solution when dissolved in water.

Comment on solubility

Solubility Characteristics

The solubility of disodium 3-[[4-[4-(2,4-diamino-5-methyl-phenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonate exhibits several notable features:

  • Solvent Interaction: This compound is generally soluble in polar solvents, particularly due to the presence of multiple sulfonate groups that enhance its interaction with water.
  • pH Dependence: The solubility may vary significantly with changes in pH. Increased acidity can potentially affect the ionization of the sulfonate groups, leading to increased solubility.
  • Temperature Influence: Like many sulfonated compounds, solubility can also improve with increased temperature, making it easier to dissolve at higher thermal conditions.
  • Concentration Effects: As with many complex organic compounds, the solubility limits can be further influenced by the concentration of the solution, with higher concentrations possibly leading to precipitation.

In summary, the solubility of disodium 3-[[4-[4-(2,4-diamino-5-methyl-phenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonate is characterized by a complex interplay of solvent composition, pH, temperature, and concentration. Understanding these factors is crucial for effectively utilizing this compound in various applications.

Interesting facts

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

Disodium 3-[[4-[4-(2,4-diamino-5-methyl-phenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonate is a fascinating compound with numerous intriguing applications and properties. Here are some key points to note:

  • Colorants and Dyes: This compound is notably used in the dye industry, primarily due to its vibrant color properties, making it an excellent candidate for various textile applications.
  • Biological Significance: Many azo compounds, including derivatives of this type, have been studied for their biological activities, including anticancer and antibacterial properties. Research into its derivatives may unveil more therapeutic potentials.
  • Analytical Applications: Due to its unique structural characteristics, this compound can serve as a valuable reagent in the development of analytical methods for detecting various substances, including heavy metals.
  • Stability Considerations: Compounds like this one often exhibit remarkable stability under various conditions, which can be advantageous in industrial processes that require robust materials.
  • Complex Formation: Its ability to form complexes with metals can have implications in coordination chemistry, opening up new areas for research into metal-ligand interactions.

As you delve deeper into this compound, consider how its multifaceted roles in various fields highlight the intricate relationships between chemical structure and function. Understanding such compounds not only enriches our knowledge of chemistry but could also pave the way for innovative technologies and applications in the future.