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Congo Red

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Identification
Molecular formula
C32H22N6Na2O6S2
CAS number
573-58-0
IUPAC name
disodium;5-[4-[4-[2,6-diamino-3-methyl-5-(4-sulfonatophenyl)azo-phenyl]azophenyl]phenyl]azo-2-hydroxy-benzoate
State
State

At room temperature, Congo Red is a solid. It is typically available in powder form, which is used for dyeing and laboratory applications.

Melting point (Celsius)
360.00
Melting point (Kelvin)
633.00
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
696.67g/mol
Molar mass
696.6650g/mol
Density
0.9923g/cm3
Appearence

Congo Red appears as a vivid red powder. It is often used as a textile dye, producing intense red hues. It is also known for its use as a pH indicator and has applications in laboratory identification procedures.

Comment on solubility

Solubility of Disodium 5-[4-[4-[2,6-diamino-3-methyl-5-(4-sulfonatophenyl)azo-phenyl]azophenyl]phenyl]azo-2-hydroxy-benzoate

Disodium 5-[4-[4-[2,6-diamino-3-methyl-5-(4-sulfonatophenyl)azo-phenyl]azophenyl]phenyl]azo-2-hydroxy-benzoate exhibits notable properties regarding its solubility:

  • Water Solubility: This compound is generally quite soluble in water due to the presence of sulfonate groups, which enhance its ionic character and facilitate interaction with polar solvents.
  • Solvent Dependence: Its solubility can vary significantly depending on the pH of the solution. In acidic or neutral conditions, the solubility may increase, while in alkaline conditions, it might be less soluble.
  • Concentration Impact: As with many compounds, higher concentrations can lead to precipitation if the solubility limit is exceeded, indicating the importance of careful concentration management for applications.
  • Role of Temperature: Increasing the temperature generally enhances the solubility of many organic compounds, and this compound is no exception. Warmer conditions can aid in dissolving larger quantities.

Overall, the solubility profile of this compound is influenced by various factors, making it essential to consider conditions like solvent choice, pH, temperature, and concentration for its effective use in chemical applications.

Interesting facts

Interesting Facts about Disodium 5-[4-[4-[2,6-Diamino-3-methyl-5-(4-sulfonatophenyl)azo-phenyl]azophenyl]phenyl]azo-2-hydroxy-benzoate

Disodium 5-[4-[4-[2,6-diamino-3-methyl-5-(4-sulfonatophenyl)azo-phenyl]azophenyl]phenyl]azo-2-hydroxy-benzoate, commonly known in various scientific applications, is an intriguing compound with several fascinating properties and uses.

Key Features

  • Versatile Dye: This compound belongs to a class of azo dyes, known for their vibrant colors and widespread utilization in textile, food, and cosmetic industries.
  • Biological Applications: The presence of the sulfonate group enhances its water solubility, making it suitable for biological studies and applications as a dye in histology.
  • Structural Complexity: The compound features multiple aromatic rings and side chains, contributing to its strong chromophoric properties. This leads to its characteristic intense color.
  • Environmental Considerations: As with many azo dyes, there is ongoing research into the environmental impact and safety of its usage, pushing for more sustainable alternatives in its application areas.

Quote to Ponder

As Louis Pasteur once said, "Science knows no country, because knowledge belongs to humanity, and is the torch which illuminates the world." This quote reminds us of the importance of understanding compounds, like disodium 5-[4-[4-[2,6-diamino-3-methyl-5-(4-sulfonatophenyl)azo-phenyl]azophenyl]phenyl]azo-2-hydroxy-benzoate], that play a significant role in various scientific advancements.

In summary, disodium 5-[4-[4-[2,6-diamino-3-methyl-5-(4-sulfonatophenyl)azo-phenyl]azophenyl]phenyl]azo-2-hydroxy-benzoate is more than just a compound; it represents intertwined realms of chemistry, biology, and environmental science, making it a compelling subject of study for scientists and students alike.

Synonyms
Benzoic acid, 5-(2-(4'-(2-(2,6-diamino-3-methyl-5-(2-(4-sulfophenyl)diazenyl)phenyl)diazenyl)(1,1'-biphenyl)-4-yl)diazenyl)-2-hydroxy-, sodium salt (1:2)
Benzoic acid, 5-[2-[4'-[2-[2,6-diamino-3-methyl-5-[2-(4-sulfophenyl)diazenyl]phenyl]diazenyl][1,1'-biphenyl]-4-yl]diazenyl]-2-hydroxy-, sodium salt (1:2)
C.I. Direct Brown 1:2
2586-58-5
Direct Brown 1A
Direct Brown 5C
Direct Brown 5G
Diphenyl Brown PT
Direct Brown CGN
Direct Brown 2GS
Enianil Brown 2GS
Honey Yellow 3GNT
Pontamine Brown NCR
Direct Brown 1:2
Oxydiamine Brown 3GN
Atlantic Brown D 3Y
Atul Direct Brown CN
Phenamine Brown D 3G
Fixanol Orange Brown X
Pontamine Brown D 3GN
Chlorazol Orange Brown X
Benzo Brown D 3GA-CF
EINECS 219-965-6
C.I. Direct Brown 1A, disodium salt
C.I. 30110
Disodium 5-((4'-((2,6-diamino-3-methyl-5-((4-sulphonatophenyl)azo)phenyl)azo)(1,1'-biphenyl)-4-yl)azo)salicylate
DTXSID3036818
Benzoic acid, 5-((4'-((2,6-diamino-3-methyl-5-((4-sulfophenyl)azo)phenyl)azo)(1,1'-biphenyl)-4-yl)azo)-2-hydroxy-, disodium salt
Disodium 5-[[4'-[[2,6-diamino-3-methyl-5-[(4-sulfonatophenyl)azo]phenyl]azo][1,1'-biphenyl]-4-yl]azo]salicylate
NS00046720