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Congo Red

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Identification
Molecular formula
C32H22N6Na2O6S2
CAS number
573-58-0
IUPAC name
trisodium;2-[(2-hydroxy-3,6-disulfonato-1-naphthyl)azo]benzoate
State
State

Congo Red is a solid at room temperature, typically found in powder form, and is soluble in water, yielding a red solution with potential applications as an indicator dye and biological stain.

Melting point (Celsius)
360.00
Melting point (Kelvin)
633.15
Boiling point (Celsius)
324.00
Boiling point (Kelvin)
597.15
General information
Molecular weight
696.67g/mol
Molar mass
696.6650g/mol
Density
0.9908g/cm3
Appearence

Congo Red appears as a red-brown to dark red powder. When dissolved in water, it exhibits a distinct red color. It is often used as a pH indicator, where it changes color from blue to red as the pH shifts from alkaline to acidic. It’s also used as a dye for textiles and paper.

Comment on solubility

Solubility of Trisodium 2-[(2-hydroxy-3,6-disulfonato-1-naphthyl)azo]benzoate

Trisodium 2-[(2-hydroxy-3,6-disulfonato-1-naphthyl)azo]benzoate is a salt that exhibits interesting solubility characteristics, largely influenced by its ionic structure and the presence of sulfonate groups. Here are some key points regarding its solubility:

  • Highly Soluble in Water: Due to the presence of three sodium ions and multiple sulfonate groups, this compound is expected to dissolve readily in aqueous solutions.
  • Ionic Nature: The ionic nature contributes to its ability to dissociate in solution, making it more soluble in polar solvents compared to non-polar ones.
  • Temperature Dependence: Like many salts, its solubility may increase with temperature, showing higher dissolution rates in warm water.
  • pH Influence: The solubility can also be affected by the pH of the solution; extreme pH conditions may lead to changes in solubility behavior.

In summary, the solubility of trisodium 2-[(2-hydroxy-3,6-disulfonato-1-naphthyl)azo]benzoate is significantly high in water due to its ionic and polar characteristics, enhancing its usage in various applications where high solubility is desirable.

Interesting facts

Interesting Facts about Trisodium 2-[(2-hydroxy-3,6-disulfonato-1-naphthyl)azo]benzoate

Trisodium 2-[(2-hydroxy-3,6-disulfonato-1-naphthyl)azo]benzoate, often referred to as a synthetic dye or colorant, showcases a fascinating intersection of chemistry and application in the world of dyes. Here are some remarkable insights:

  • Colorant Properties: This compound is primarily used in various applications due to its vibrant color properties. It is known for imparting rich hues in textiles, plastics, and food products.
  • Environmental Considerations: As industries strive for eco-friendliness, compounds like this are scrutinized for their environmental impact. Understanding their degradation pathways is crucial for sustainable manufacturing.
  • Medical Insights: Some studies have investigated the potential of similar azo compounds in the medical field, particularly in targeting cancer cells, thanks to their ability to be absorbed differently in biological environments.
  • Analytical Chemistry: The compound's distinct structure makes it a valuable reference standard in analytical methods such as HPLC (High Performance Liquid Chromatography), allowing chemists to quantify substances in various samples.

One fascinating quote from a textbook on dye chemistry states, "The vibrant colors of synthetic dyes are not just visual stimuli; they are a testimony to the intricate dance of electrons in the molecular architecture." This underscores the importance of understanding not just the use but the underlying chemistry that gives rise to the compound's unique characteristics.

In conclusion, trisodium 2-[(2-hydroxy-3,6-disulfonato-1-naphthyl)azo]benzoate exemplifies how a single chemical compound can have wide-ranging applications and implications in both industrial and academic realms.