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Carmoisine

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Identification
Molecular formula
C20H12N2Na2O7S2
CAS number
3567-69-9
IUPAC name
disodium;5-hydroxy-6-[(1-hydroxy-4-sulfonato-2-naphthyl)azo]-8-[2-methyl-4-(m-tolyl)phenyl]azo-naphthalene-1-sulfonate
State
State

At room temperature, Carmoisine is typically a solid in powder form.

Melting point (Celsius)
232.00
Melting point (Kelvin)
505.15
Boiling point (Celsius)
300.00
Boiling point (Kelvin)
573.15
General information
Molecular weight
502.44g/mol
Molar mass
502.4390g/mol
Density
0.9601g/cm3
Appearence

Carmoisine is a synthetic azo dye that appears as a red to maroon powder. It is commonly used in food and cosmetics to impart a red color.

Comment on solubility

Solubility of Disodium 5-Hydroxy-6-[(1-Hydroxy-4-Sulfonato-2-Naphthyl)Azo]-8-[2-Methyl-4-(m-Tolyl)Phenyl]Azo-Naphthalene-1-Sulfonate

The solubility of the compound disodium 5-hydroxy-6-[(1-hydroxy-4-sulfonato-2-naphthyl)azo]-8-[2-methyl-4-(m-tolyl)phenyl]azo-naphthalene-1-sulfonate can be characterized by several key factors:

  • Water Solubility: This compound is expected to be highly soluble in water due to the presence of multiple sulfonate groups. These ionic functionalities enhance the compound's affinity for the polar solvent.
  • Temperature Dependence: Like many ionic compounds, solubility may increase with temperature, making it easier to dissolve at elevated temperatures.
  • pH Sensitivity: The solubility can also be influenced by the pH of the solution; changes in pH may affect the ionization of the sulfonate groups, hence altering solubility.
  • Organic Solvents: The solubility in organic solvents may be limited; however, small amounts might dissolve in polar organic solvents due to the hydrophobic aromatic rings.

In summary, the solubility of this complex compound is primarily determined by its ionic structure, interaction with solvent polarity, and external conditions such as temperature and pH. These factors make it a fascinating subject for further study in terms of solubility behavior.

Interesting facts

Interesting Facts about Disodium;5-hydroxy-6-[(1-hydroxy-4-sulfonato-2-naphthyl)azo]-8-[2-methyl-4-(m-tolyl)phenyl]azo-naphthalene-1-sulfonate

This compound, a complex azo dye, is part of the class of synthetic dyes known for their vibrant colors and diverse applications. Here are some intriguing aspects:

  • Azo Structure: The presence of the azo group (–N=N–) in its structure allows for a wide range of color variations and is fundamental in dye chemistry. The azo group serves as a chromophore, contributing significantly to the compound’s coloring properties.
  • Applications: This dye is primarily used in various fields including:
    • Textiles, where it imparts bright, long-lasting colors.
    • Cosmetics, ensuring vibrant pigmentation in products.
    • Food industry, per some formulations, providing food with appealing color.
  • Environmental Considerations: As with many azo dyes, potential environmental impacts stem from their degradation products. It's essential for industries using this compound to consider effective treatment methods to mitigate any adverse effects.
  • Structural Complexity: The intricate arrangement of hydrophilic and hydrophobic groups in this dye influences its interaction with various substrates, enhancing its application versatility.
  • Safety and Regulations: The compound's safety profile is an important subject of research, with regulations governing its use in consumer products, aiming to protect human health and the environment.

As a fascinating intersection of chemistry and practical application, this compound illustrates the significance of chemical design in creating effective materials for a multitude of uses. In the ever-evolving field of chemical science, compounds like this bring both challenges and opportunities for innovation.

Synonyms
C.I. Direct Violet 28
6420-06-0
Disodium;5-hydroxy-6-[(1-hydroxy-4-sulfonatonaphthalen-2-yl)diazenyl]-8-[[2-methyl-4-(3-methylphenyl)phenyl]diazenyl]naphthalene-1-sulfonate
C.I. Direct Violet 28, disodium salt
C.I. 23685
1-Naphthalenesulfonic acid, 4-hydroxy-3-((4'-((1-hydroxy-5-sulfo-2-naphthalenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-, disodium salt
DTXSID001023465
1-Naphthalenesulfonic acid, 4-hydroxy-3-((4'-((1-hydroxy-5-sulfo-2-naphthalenyl)azo)-3,3'-dimethyl(1,1'-bip henyl)-4-yl)azo)-, disodium salt