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Disodium Salt of Congo Red

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

At room temperature, the compound is solid.

Melting point (Celsius)
360.00
Melting point (Kelvin)
633.15
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
696.67g/mol
Molar mass
696.6650g/mol
Density
0.9885g/cm3
Appearence

Congo Red appears as a red-brown to dark red solid in crystalline form. When dissolved in water, it produces a red solution that turns blue in acidic conditions.

Comment on solubility

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

Disodium;5-(4-hydroxyphenyl)azo-2-[2-[4-(4-hydroxyphenyl)azo-2-sulfonato-phenyl]vinyl]benzenesulfonate is a complex azo dye that exhibits notable solubility characteristics primarily due to its ionic nature introduced by the sulfonate groups. The solubility of this compound can be summarized as follows:

  • High water solubility: The presence of multiple sulfonate groups facilitates the dissolution in aqueous environments, making it highly soluble in water.
  • Solvent-dependent: While it is soluble in water, its solubility may vary in organic solvents due to decreased polarity.
  • Environmental relevance: Such solubility attributes allow this compound to be used in a variety of applications, especially in biological and analytical contexts.

The ionic interactions and ability to form hydrogen bonds with water molecules significantly contribute to its solubility. However, it’s crucial to note that while this compound is soluble in water, solubility can be altered by factors like temperature and pH. In general, compounds with similar structures tend to behave predictively in terms of solubility, showcasing how nuances in chemical structure can dictate physical properties.

In conclusion, the solubility profile of disodium;5-(4-hydroxyphenyl)azo-2-[2-[4-(4-hydroxyphenyl)azo-2-sulfonato-phenyl]vinyl]benzenesulfonate highlights the importance of functional groups in defining solubility characteristics and enhances its potential for various applications.

Interesting facts

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

Disodium 5-(4-hydroxyphenyl)azo-2-[2-[4-(4-hydroxyphenyl)azo-2-sulfonato-phenyl]vinyl]benzenesulfonate, often referred to simply as a dye, is a fascinating compound with wide-ranging applications in various fields. Here are some interesting aspects of this vibrant and complex substance:

  • Colorful Chemistry: This compound belongs to the azo dye family, known for their vivid colors and their significant role in textile dyeing. They exhibit rich hues due to the presence of the azo group (–N=N–) which is integral to their chromophoric properties.
  • Biological Significance: The design of this compound showcases its potential use in biological research. Azo dyes are often employed as markers in biochemical assays due to their ability to undergo color changes in response to various stimuli.
  • Environmental Considerations: While azo dyes have many uses, it is important to note that some members of this family can generate toxic aromatic amines upon degradation. As a result, ongoing research aims to ensure that these compounds can be used safely and sustainably.
  • Applications in Art: Artists and designers appreciate synthetic dyes like this for their stability and long-lasting color. Their vibrant shades can enhance art pieces, textiles, and fashion items.
  • Research and Development: Scientists continue to bridge the gap between chemistry and applications by designing new derivatives of azo dyes. Modifications can lead to novel materials with unique properties, expanding their utility in various industries.

In the words of a famous chemist, "The world is but a canvas to our imagination," and compounds like disodium 5-(4-hydroxyphenyl)azo-2-[2-[4-(4-hydroxyphenyl)azo-2-sulfonato-phenyl]vinyl]benzenesulfonate reflect the artistry of chemistry in creating substances that are both functional and visually appealing. As research continues, who knows what new frontiers this compound may help us discover?

Synonyms
DTXSID8062814
Sodium 4,4'-bis(p-hydroxyphenylazo)-2,2'-vinylenedibenzenesulphonate
DTXCID0038209
disodium;5-[(4-hydroxyphenyl)diazenyl]-2-[2-[4-[(4-hydroxyphenyl)diazenyl]-2-sulfonatophenyl]ethenyl]benzenesulfonate
Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-[2-(4-hydroxyphenyl)diazenyl]-, sodium salt (1:2)
disodium 5-[2-(4-oxocyclohexa-2,5-dien-1-ylidene)hydrazin-1-yl]-2-[(1E)-2-{4-[2-(4-oxocyclohexa-2,5-dien-1-ylidene)hydrazin-1-yl]-2-sulfonatophenyl}ethenyl]benzenesulfonate
disodium 5-[2-(4-oxocyclohexa-2,5-dien-1-ylidene)hydrazin-1-yl]-2-(2-{4-[2-(4-oxocyclohexa-2,5-dien-1-ylidene)hydrazin-1-yl]-2-sulfonatophenyl}ethenyl)benzenesulfonate