Skip to main content

Congo red

ADVERTISEMENT
Identification
Molecular formula
C32H22N6Na2O6S2
CAS number
573-58-0
IUPAC name
disodium;4-[2-[4,6-dioxo-5-[(4-sulfonato-1-naphthyl)hydrazono]cyclohex-2-en-1-ylidene]hydrazino]naphthalene-1-sulfonate
State
State

At room temperature, Congo red exists in a solid state. It is commonly used in laboratories for its staining properties and is freely soluble in water, forming a clear, red solution.

Melting point (Celsius)
357.00
Melting point (Kelvin)
630.00
Boiling point (Celsius)
250.00
Boiling point (Kelvin)
523.00
General information
Molecular weight
696.67g/mol
Molar mass
696.6650g/mol
Density
0.9853g/cm3
Appearence

Congo red appears as a dark red to purple solid. It is often found in a powdered form and is known for its vibrant red coloration when dissolved in water.

Comment on solubility

Solubility of Disodium 4-[2-[4,6-Dioxo-5-[(4-Sulfonato-1-Naphthyl)Hydrazono]Cyclohex-2-En-1-Ylidene]Hydrazino]Naphthalene-1-Sulfonate

Disodium 4-[2-[4,6-dioxo-5-[(4-sulfonato-1-naphthyl)hydrazono]cyclohex-2-en-1-ylidene]hydrazino]naphthalene-1-sulfonate exhibits considerable solubility in aqueous solutions due to the presence of sulfonate groups that enhance its ionic character. The solubility characteristics can be summarized as follows:

  • Water Solubility: It is highly soluble in water, making it suitable for various applications in biochemical and analytical chemistry.
  • Influence of pH: The solubility may vary with pH, and acidic or basic conditions could further affect the dissolution behavior.
  • Temperature Impact: Higher temperatures typically increase the solubility of most ionic compounds, and this compound is no exception.

This compound's solubility is significant for its utility in applications such as dye chemistry, where it functions effectively in aqueous systems. As quoted from solubility studies, "the presence of sulfonate groups is crucial in enhancing solubility in polar solvents."
Hence, the capacity to dissolve efficiently makes it a valuable compound for researchers and industrial applications alike.

Interesting facts

Interesting Facts about Disodium 4-[2-[4,6-Dioxo-5-[(4-Sulfonato-1-naphthyl)hydrazono]cyclohex-2-en-1-ylidene]hydrazino]naphthalene-1-sulfonate

This intriguing compound, commonly referred to as a sulfonated derivative of naphthalene, showcases the fascinating intersection of organic chemistry and material science. Here are some insightful aspects to consider:

  • Complex Structure: Disodium 4-[2-[4,6-Dioxo-5-[(4-Sulfonato-1-naphthyl)hydrazono]cyclohex-2-en-1-ylidene]hydrazino]naphthalene-1-sulfonate is characterized by a complex molecular architecture, featuring multiple functional groups, including hydrazone links and sulfonate moieties.
  • Applications in Dyes: This compound is notable for its applications in dye chemistry, where it can act as a dyeing agent due to its extensive conjugated system, allowing for vibrant coloration in a variety of materials.
  • Biological Relevance: The incorporation of sulfonate groups enhances water solubility, making this compound suitable for various biological applications, including in the development of pharmaceuticals and biologically active compounds.
  • Synthesis and Reactivity: Understanding the synthetic pathways and reactivity of this compound provides insight into complex chemical reactions that involve multi-step processes, showcasing the creativity required in organic synthesis.
  • Eco-Friendly Innovations: Researchers are actively exploring derivatives of such compounds as eco-friendly alternatives in industrial applications, thereby minimizing environmental impact without sacrificing performance.

As you delve deeper into the study of disodium 4-[2-[4,6-Dioxo-5-[(4-Sulfonato-1-naphthyl)hydrazono]cyclohex-2-en-1-ylidene]hydrazino]naphthalene-1-sulfonate, one might reflect on the words of the renowned chemist Robert H. Grubbs, who once said, “The beauty of science is that it offers a solution to the problems we face, often in unexpected ways.” This compound exemplifies such ingenuity and versatility.


Synonyms
DTXSID2041707
C.I. ACID BROWN 14, DISODIUM SALT
1-Naphthalenesulfonic acid, 4,4'-((2,4-dihydroxy-1,3-phenylene)bis(2,1-diazenediyl))bis-, sodium salt (1:2)
1-Naphthalenesulfonic acid, 4,4'-[(2,4-dihydroxy-1,3-phenylene)bis(2,1-diazenediyl)]bis-, sodium salt (1:2)
DTXCID001474357
C.I. Acid Brown 14, disodium salt (8CI)
5850-16-8
Acid Brown 14
Acid Brown M
C.I. 20195
Disodium 4,4'-(2,4-dihydroxy-1,3-phenylene)bis(azo)bisnaphthalene-1-sulphonate
UTIACSXEVKXHPT-UHFFFAOYSA-L
Sodium 4,4'-((2,4-dihydroxy-1,3-phenylene)bis(diazene-2,1-diyl))bis(naphthalene-1-sulfonate)
C.I.Acid Brown 14 (C.I.20195)
Q27272603
disodium 4-(2-{4,6-dioxo-5-[2-(4-sulfonatonaphthalen-1-yl)hydrazin-1-ylidene]cyclohex-2-en-1-ylidene}hydrazin-1-yl)naphthalene-1-sulfonate
disodium;4-[2-[4,6-dioxo-5-[(4-sulfonatonaphthalen-1-yl)hydrazinylidene]cyclohex-2-en-1-ylidene]hydrazinyl]naphthalene-1-sulfonate