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Carmoisine

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Identification
Molecular formula
C20H12N2Na2O7S2
CAS number
3567-69-9
IUPAC name
5-[4-[4-[(1-amino-4-sulfo-2-naphthyl)azo]phenyl]phenyl]azo-2-hydroxy-benzoic acid
State
State

At room temperature, carmoisine is typically in a powdered solid state.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.15
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
502.44g/mol
Molar mass
502.4410g/mol
Density
1.5600g/cm3
Appearence

Carmoisine appears as a red to maroon powder.

Comment on solubility

Solubility of 5-[4-[4-[(1-amino-4-sulfo-2-naphthyl)azo]phenyl]phenyl]azo-2-hydroxy-benzoic acid

The solubility of 5-[4-[4-[(1-amino-4-sulfo-2-naphthyl)azo]phenyl]phenyl]azo-2-hydroxy-benzoic acid can be quite intriguing due to its complex structure and the presence of various functional groups.

Key points about its solubility include:

  • Aqueous Solubility: This compound contains an amino group and a sulfonic acid group, which enhances its polarity, often resulting in higher solubility in water compared to purely hydrophobic compounds.
  • Effect of pH: The solubility may significantly change depending on the pH of the solution, as carboxylic acids can dissociate to form anions in basic conditions, increasing water solubility.
  • Influence of Temperature: Like many organic compounds, its solubility might increase with temperature, enabling better interactions with water molecules.
  • Organic Solvents: While it is likely more soluble in water due to its functional groups, the solubility in organic solvents may vary and could be lower if the solvent does not engage in favorable interactions.

In summary, the solubility of this compound is dictated by its functional groups and the environmental conditions. As stated, “Solubility is a dynamic interaction between the properties of the solute and the solvent.” Thus, understanding this balance is vital when working with this complex dye.

Interesting facts

Interesting Facts about 5-[4-[4-[(1-amino-4-sulfo-2-naphthyl)azo]phenyl]phenyl]azo-2-hydroxy-benzoic acid

This compound, a complex azo dye, is noteworthy for its vibrant coloring properties and various applications in different fields. Here are some interesting facts that highlight its significance:

  • Azo Compounds: The structure features azo groups (–N=N–), which are responsible for the compound's vivid colors. Azo dyes are among the largest class of synthetic dyes.
  • Applications: This compound is often utilized in fields such as textiles and food coloration due to its stability and high coloration power. It can impart brilliant shades to fabrics and other materials.
  • Biological Importance: The presence of the sulfonic acid group enhances the water solubility of the dye, making it particularly useful in biochemical applications, including staining in microscopy.
  • Research and Development: Scientists are continually exploring the potential of azo dyes in pharmaceuticals, particularly in drug delivery systems where their vibrant colors can be employed in imaging and tracking.
  • Sustainability Concerns: Despite their useful properties, azo dyes, including this compound, face scrutiny regarding environmental impact and toxicity. This has led to research into safer alternatives and regulations governing their use.

In the world of synthetic chemistry, compounds like 5-[4-[4-[(1-amino-4-sulfo-2-naphthyl)azo]phenyl]phenyl]azo-2-hydroxy-benzoic acid provide unique opportunities for innovation and exploration, catering to both visual appeal and practical applications.

Synonyms
DTXSID10862934
5-({4'-[(1-Amino-4-sulfonaphthalen-2-yl)diazenyl][1,1'-biphenyl]-4-yl}diazenyl)-2-hydroxybenzoic acid