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Congo Red

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Identification
Molecular formula
C32H22N6Na2O6S2
CAS number
573-58-0
IUPAC name
disodium;5-(4-ethoxyphenyl)azo-2-[2-[4-(4-ethoxyphenyl)azo-2-sulfonato-phenyl]vinyl]benzenesulfonate
State
State

At room temperature, Congo Red is in a solid state, usually a powdered form, suitable for weighing and mixing. It easily dissolves in water, producing its characteristic red solution.

Melting point (Celsius)
320.00
Melting point (Kelvin)
593.00
Boiling point (Celsius)
147.00
Boiling point (Kelvin)
420.00
General information
Molecular weight
696.66g/mol
Molar mass
696.6640g/mol
Density
1.0000g/cm3
Appearence

Congo Red typically appears as a red-brown powder. In solution, it exhibits a vivid red color, making it a popular dye in various applications, particularly in biological staining.

Comment on solubility

Solubility of Disodium 5-(4-ethoxyphenyl)azo-2-[2-[4-(4-ethoxyphenyl)azo-2-sulfonato-phenyl]vinyl]benzenesulfonate

Disodium 5-(4-ethoxyphenyl)azo-2-[2-[4-(4-ethoxyphenyl)azo-2-sulfonato-phenyl]vinyl]benzenesulfonate is a unique compound exhibiting specific solubility characteristics due to its complex structure. Here are some insights into its solubility profile:

  • Aqueous Solubility: Due to the presence of sulfonate groups, this compound is generally considered to have good solubility in water. The sulfonate moiety enhances ionic interactions with water, allowing the compound to dissolve effectively.
  • Solvent Dependence: While it is soluble in water, the solubility can vary with changes in pH and temperature. Basic conditions may further increase solubility by deprotonating any acidic sites, enhancing overall interaction.
  • Organic Solvents: Its solubility in organic solvents can be limited, as the polar sulfonate groups generally favor aqueous environments. However, some organic solvents with polar characteristics may solubilize the compound to a modest extent.
  • Concentration Effects: Higher concentrations may lead to solubility saturation, forming aggregates or precipitates in solution. Therefore, careful control of concentration is essential when working with this compound.

Overall, the solubility of this compound is primarily influenced by its ionic nature, making it more adaptable to aqueous environments, while still requiring consideration of solvent interactions and concentration factors for optimal use.

Interesting facts

Interesting Facts about Disodium 5-(4-ethoxyphenyl)azo-2-[2-[4-(4-ethoxyphenyl)azo-2-sulfonato-phenyl]vinyl]benzenesulfonate

Disodium 5-(4-ethoxyphenyl)azo-2-[2-[4-(4-ethoxyphenyl)azo-2-sulfonato-phenyl]vinyl]benzenesulfonate is a fascinating compound belonging to the category of azo dyes. Here are some interesting aspects of this compound:

  • Azo Dyes: This compound contains the azo group (-N=N-), which is characteristic of azo dyes, a class of synthetic colorants widely used in textiles and food products.
  • Color Vibrancy: Azo dyes are known for their bright and vivid colors, attributed to the extended conjugation of electrons in the azo group, allowing for various hues.
  • Applications: Due to their color fastness and versatility, azo dyes like this one find extensive use in various industries, including:
    • Textile dyeing
    • Food coloring
    • Cosmetics
    • Biological markers in analytical chemistry
  • Environmental Awareness: The study of azo dyes has also prompted research into their environmental impact, particularly regarding some azo compounds that may degrade into aromatic amines, which are known for their potential toxicity.
  • Sulfonate Group: The presence of sulfonate groups in this compound enhances its solubility in water, making it a suitable choice for aqueous dyeing methods.

In conclusion, Disodium 5-(4-ethoxyphenyl)azo-2-[2-[4-(4-ethoxyphenyl)azo-2-sulfonato-phenyl]vinyl]benzenesulfonate exemplifies the intricate relationship between chemical structure, color properties, and practical applications. As a chemistry student or scientist, studying such compounds can shed light on both the utility and environmental implications of synthetic dyes. Remember, “Chemistry is the study of matter, but I prefer to see it as the study of change” – a quote by *Robert House* that perfectly encapsulates the essence of exploring chemical compounds like this one!

Synonyms
Sodium 6,6'-(ethene-1,2-diyl)bis(3-((4-ethoxyphenyl)diazenyl)benzenesulfonate)
CHEMBL3188501