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Sodium Congo Red

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Identification
Molecular formula
C32H22N6Na2O6S2
CAS number
573-58-0
IUPAC name
sodium;4-(4-anilinophenyl)azobenzenesulfonate
State
State

At room temperature, Sodium Congo Red is a solid. It is typically handled as a powder or granules in laboratory settings.

Melting point (Celsius)
357.00
Melting point (Kelvin)
630.15
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
696.67g/mol
Molar mass
696.6650g/mol
Density
1.5200g/cm3
Appearence

Sodium Congo Red appears as a red-brown powder. Due to its bright red color, it is often used as a dye. In solution, it exhibits a red color which shifts to blue in acidic conditions.

Comment on solubility

Solubility of sodium 4-(4-anilinophenyl)azobenzenesulfonate

Sodium 4-(4-anilinophenyl)azobenzenesulfonate is a highly interesting compound when it comes to solubility. This compound displays a variety of solubility characteristics which can be summarized as follows:

  • Water Solubility: This compound is highly soluble in water due to the presence of the sulfonate group, which enhances its ionic character.
  • Solvent Behavior: It may also exhibit varying solubility in organic solvents, depending on the specific solvent polarity.
  • Temperature Dependency: The solubility can change with temperature, generally increasing as the temperature rises, which is common for many ionic compounds.

In practical applications, the solubility of sodium 4-(4-anilinophenyl)azobenzenesulfonate makes it useful in various formulations, including dyes and pharmaceuticals.

Overall, understanding the solubility properties of this compound is crucial for its effective application in different fields.

Interesting facts

Interesting Facts About Sodium 4-(4-anilinophenyl)azobenzenesulfonate

Sodium 4-(4-anilinophenyl)azobenzenesulfonate, often referred to as an azo dye, is a fascinating compound with diverse applications and intriguing properties. Here are several key points about this compound:

  • Azo Dyes: This compound belongs to the azo dye family, characterized by the presence of the –N=N– (azo) functional group. Azo dyes are widely used in the textile industry for their vibrant colors and excellent coloring properties.
  • Industrial Applications: It finds applications not just in textiles but also in the formulation of inks, paints, and other coloring materials. Its ability to impart bright colors makes it invaluable across various sectors.
  • Biological Activity: Some studies have suggested that azo compounds can exhibit various biological activities, including antimicrobial and antioxidant properties. However, caution is necessary since some azo dyes can decompose into potentially harmful aromatic amines.
  • Environmental Concerns: The use of azo dyes has raised environmental concerns due to their persistence and toxicity in the environment. As a result, regulatory restrictions have become more stringent around their usage.
  • Synthetic Routes: The synthesis of sodium 4-(4-anilinophenyl)azobenzenesulfonate can be complex and typically involves diazotization and coupling reactions, which are fundamental techniques in organic chemistry.

Overall, sodium 4-(4-anilinophenyl)azobenzenesulfonate exemplifies the intersection of chemistry and industry, showcasing the challenges and benefits associated with the use of chemical compounds in practical applications. Its vibrant colors and varied uses continue to make it a subject of study and innovation in the field of chemistry.