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Ponceau 4R

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Identification
Molecular formula
C20H12N4O7S2
CAS number
2611-82-7
IUPAC name
4-imino-3-[(4-nitrophenyl)hydrazono]-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonic acid
State
State

At room temperature, Ponceau 4R is typically found as a solid. It is stable under normal conditions but should be stored in a dry place as it can absorb moisture.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.00
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
604.50g/mol
Molar mass
604.4960g/mol
Density
1.3800g/cm3
Appearence

Ponceau 4R appears as a red to scarlet powder or granules. It is often used in its sodium salt form, which is water-soluble and used as a coloring agent in various applications. The compound provides a bright red color when dissolved.

Comment on solubility

Solubility of 4-imino-3-[(4-nitrophenyl)hydrazono]-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonic acid

The solubility of 4-imino-3-[(4-nitrophenyl)hydrazono]-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonic acid in various solvents can vary considerably due to its complex structure. As a disulfonic acid derivative, this compound exhibits notable solubility characteristics influenced by the following factors:

  • Polar Solvents: The presence of sulfonic acid groups enhances solubility in polar solvents, particularly water. Disulfonic acids tend to ionize, leading to increased solubility.
  • Non-Polar Solvents: In non-polar solvents, solubility may be limited. The hydrophobic phenyl and naphthalene components contribute to lower solubility.
  • Temperature Effects: Elevated temperatures can often augment solubility in certain solvents, allowing for greater dissolution of the compound.

In general, it can be stated that:

  • The compound is likely to be highly soluble in aqueous solutions.
  • As you move towards non-polar solvents, solubility might demonstrate a significant decline.

Thus, for practical applications and formulations, water or other polar solvents are recommended for effectively utilizing 4-imino-3-[(4-nitrophenyl)hydrazono]-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonic acid, aligning with the general behaviors observed in sulfonated organic compounds.

Interesting facts

Interesting Facts about 4-Imino-3-[(4-Nitrophenyl)hydrazono]-5-Oxo-6-(Phenylhydrazono)naphthalene-2,7-disulfonic Acid

This compound, known for its complex structure, is a member of the naphthalene sulfonic acid family, which has garnered interest in various fields, including pharmaceuticals and dye chemistry. Here are some intriguing aspects of this compound:

  • Diverse Applications: Its unique chemical structure makes it valuable in synthesizing dyes and pigments, which are crucial in the textile and food industries.
  • Biological Relevance: Compounds similar in structure have been studied for their antibacterial and antifungal properties, indicating that this compound may have potential therapeutic applications.
  • Substituent Impact: The presence of groups like the 4-nitrophenyl and phenylhydrazono moieties can significantly influence the compound's reactivity and interaction, making it an interesting subject for researchers.
  • Colorimetric Behavior: This compound may exhibit color changes in response to different pH levels, serving as a potential pH indicator or colorimetric sensor.

The synthesis of 4-imino-3-[(4-nitrophenyl)hydrazono]-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonic acid often involves multi-step reactions, showcasing the *intricate nature* of organic synthesis. As a scientist or a chemistry student, exploring this compound can unveil numerous avenues for research and innovation.

In conclusion, the chemical, physical, and potential biological properties of this compound render it a fascinating subject in the study of *sulfonic acids*, and the broader implications of its use could shape various industries.