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Carmoisine

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Identification
Molecular formula
C20H13N4Na3O10S3
CAS number
3567-69-9
IUPAC name
trisodium;6-amino-3-[[7-[4-[(4-amino-7-sulfonato-1-naphthyl)azo]phenyl]azo-8-hydroxy-6-sulfonato-2-naphthyl]azo]-4-hydroxy-naphthalene-2-sulfonate
State
State

Carmoisine is typically found in a solid state at room temperature, forming a powder. It is stable under normal conditions but should be stored in a cool and dry environment to maintain its quality and color properties.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.15
Boiling point (Celsius)
349.00
Boiling point (Kelvin)
622.15
General information
Molecular weight
534.38g/mol
Molar mass
534.3800g/mol
Density
1.4800g/cm3
Appearence

Carmoisine appears as a red to maroon powder. It is a synthetic azo dye used in foods and other applications. The compound is known for its vibrant red color, making it popular in coloring food products such as candies, beverages, and desserts.

Comment on solubility

Solubility of Trisodium 6-amino-3-[[7-[4-[(4-amino-7-sulfonato-1-naphthyl)azo]phenyl]azo-8-hydroxy-6-sulfonato-2-naphthyl]azo]-4-hydroxy-naphthalene-2-sulfonate

The compound trisodium 6-amino-3-[[7-[4-[(4-amino-7-sulfonato-1-naphthyl)azo]phenyl]azo-8-hydroxy-6-sulfonato-2-naphthyl]azo]-4-hydroxy-naphthalene-2-sulfonate is characterized by its extensive solubility in various solvents, particularly in aqueous solutions. This is largely attributed to the presence of multiple sulfonate groups, which enhance its interaction with water.

Key Aspects of Solubility:

  • High Aqueous Solubility: The sulfonate functional groups contribute to a high degree of ionization, making the compound easily soluble in water.
  • Influence of pH: The solubility can be influenced by the pH of the solution; lower pH values may increase solubility due to protonation effects.
  • Temperature Dependence: As with most compounds, an increase in temperature usually leads to an increase in solubility.
  • Miscibility with Organic Solvents: While aqueous solubility is significant, solubility in organic solvents is generally lower, demonstrating the hydrophilic nature of the compound.

In summary, trisodium 6-amino-3-[[7-[4-[(4-amino-7-sulfonato-1-naphthyl)azo]phenyl]azo-8-hydroxy-6-sulfonato-2-naphthyl]azo]-4-hydroxy-naphthalene-2-sulfonate exhibits remarkable solubility that is primarily influenced by its ionic characteristics. The presence of multiple sulfonate groups makes it a unique candidate for uses in various aqueous applications.

Interesting facts

Interesting Facts about Trisodium 6-Amino-3-[[7-[4-[(4-Amino-7-Sulfonato-1-Naphthyl)Azo]Phenyl]Azo-8-Hydroxy-6-Sulfonato-2-Naphthyl]Azo]-4-Hydroxy-Naphthalene-2-Sulfonate

This colorful compound is renowned in the fields of analytical chemistry and dye chemistry. Here are some noteworthy aspects that make it particularly fascinating:

  • Vibrant Colorant: Trisodium 6-Amino-3-[[7-[4-[(4-Amino-7-Sulfonato-1-Naphthyl)Azo]Phenyl]Azo-8-Hydroxy-6-Sulfonato-2-Naphthyl]Azo]-4-Hydroxy-Naphthalene-2-Sulfonate is part of a family of azo dyes, which are characterized by their vivid hues. This compound can produce a wide range of brilliant colors, making it a valuable asset in the textile industry.
  • Biomedical Applications: Certain azo dyes, including this compound, are utilized in various biomedical applications. They can act as indicators in biochemical assays, aiding in the detection of substances in complex mixtures.
  • Environmental Considerations: While the vibrant colors of azo dyes like this one can be appealing, they have been scrutinized for their potential environmental impact. Many compounds in this category are known to be persistent in nature and may require careful management to avoid harmful effects on aquatic systems.
  • Chemical Versatility: The presence of multiple functional groups enhances the chemical reactivity of this compound, enabling modifications that can tailor its properties for specific applications.
  • Historical Significance: The development of azo dyes marks a significant milestone in the history of chemistry, symbolizing the transition from natural dyes to chemically synthesized alternatives. This shift laid the foundation for modern coloring technologies.

As a compound rich in both color and chemical functionality, this trisodium salt serves as a striking example of the intersection between chemistry and artistry, underscoring the importance of responsible innovation in chemical applications.

Synonyms
C.I. Direct Black 80
EINECS 232-322-4
C.I. 31600
2-Naphthalenesulfonic acid, 6-((7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-3-((4-((4-amino-6(or 7)-sulfo-1-naphthalenyl)azo)phenyl)azo)-4-hydroxy-, trisodium salt
Trisodium 6-((7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo)-3-((4-((4-amino-6(or 7)-sulphonatonaphthyl)azo)phenyl)azo)-4-hydroxynaphthalene-2-sulphonate
2-Naphthalenesulfonic acid, 6-(2-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl)-3-(2-(4-(2-(4-amino-6(or 7)-sulfo-1-naphthalenyl)diazenyl)phenyl)diazenyl)-4-hydroxy-, sodium salt (1:3)
2-Naphthalenesulfonic acid, 6-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-3-[[4-[[4-amino-6(or 7)-sulfo-1-naphthalenyl]azo]phenyl]azo]-4-hydroxy-, trisodium salt
2-Naphthalenesulfonic acid, 6-[2-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl]-3-[2-[4-[2-[4-amino-6(or 7)-sulfo-1-naphthalenyl]diazenyl]phenyl]diazenyl]-4-hydroxy-, sodium salt (1:3)
Trisodium 6-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-3-[[4-[[4-amino-6(or 7)-sulphonatonaphthyl]azo]phenyl]azo]-4-hydroxynaphthalene-2-sulphonate
PHENAZO BLACK OB
DIAZOPHENYL BLACK BW
DTXSID7025188
DTXCID101323303
2-NAPHTHALENESULFONIC ACID, 6-((7-AMINO-1-HYDROXY-3-SULFO-2-NAPHTHALENYL)AZO)-3-((4-((4-AMINO-6(OR 7)-SULFO-1-NAPHTHALENYL)AZO)PHENYL)AZO)-4-HYDROXY-,TRISODIUM SALT
2-Naphthalenesulfonic acid, 6-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo-3-4-4-amino-6(or 7)-sulfo-1-naphthalenylazophenylazo-4-hydroxy-, trisodium salt
232-322-4
39384-51-5
6-((7-AMINO-1-HYDROXY-3-SULFO-2-NAPHTHALENYL)AZO)-3-((4-((4-AMINO-6(OR 7)-SULFO-1-NAPHTHALENYL)AZO)PHENYL)AZO)-4-HYDROXY-2-NAPHTHALENESULFONIC ACID,TRISODIUM SALT
814-746-7
8003-69-8
trisodium;6-amino-3-[[7-[[4-[(4-amino-7-sulfonatonaphthalen-1-yl)diazenyl]phenyl]diazenyl]-8-hydroxy-6-sulfonatonaphthalen-2-yl]diazenyl]-4-hydroxynaphthalene-2-sulfonate
DTXSID10873429
NS00046858
6409-32-1
Trisodium 6-amino-3-{[7-({4-[(4-amino-7-sulfonatonaphthalen-1-yl)diazenyl]phenyl}diazenyl)-8-hydroxy-6-sulfonatonaphthalen-2-yl]diazenyl}-4-hydroxynaphthalene-2-sulfonate