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Sunset Yellow FCF

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Identification
Molecular formula
C16H10N2O7S2
CAS number
2783-94-0
IUPAC name
3-hydroxy-4-phenylazo-naphthalene-2,7-disulfonic acid
State
State

At room temperature, Sunset Yellow FCF is typically found as a solid. It is stable in its solid form but dissolves in water to form a solution with an orange to yellow coloration.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.00
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
452.39g/mol
Molar mass
452.3800g/mol
Density
0.9634g/cm3
Appearence

Sunset Yellow FCF appears as an orange-red solid, often available in the form of a powder or granules. It is a synthetic azo dye used extensively for coloring purposes in food and other industries. The dye exhibits a bright orange hue when dissolved in water and is noted for its strong color intensity.

Comment on solubility

Solubility of 3-hydroxy-4-phenylazo-naphthalene-2,7-disulfonic acid

3-hydroxy-4-phenylazo-naphthalene-2,7-disulfonic acid, with its complex structure, demonstrates interesting solubility properties. This compound is generally considered:

  • Soluble in water due to the presence of two sulfonic acid groups which enhance its polarity and ability to interact with water molecules.
  • Less soluble in non-polar solvents, as the aromatic nature limits interactions with such solvents, making them poor media for dissolution.

The solubility can be attributed to the following factors:

  • Ionization of sulfonic groups: The sulfonic acid groups can dissociate in aqueous solutions, contributing to increased solubility.
  • Hydrogen bonding: The hydroxyl group can form hydrogen bonds with water, further facilitating solubility.
  • Aromatic interactions: Though non-polar, the aromatic system can still influence solubility through stacking interactions with solvent molecules.

Overall, the solubility profile of this compound indicates that while it thrives in polar environments, such as water, its solubility decreases markedly in hydrophobic conditions. Thus, taking into account environmental variables is crucial when working with this compound.

Interesting facts

Interesting Facts About 3-Hydroxy-4-phenylazo-naphthalene-2,7-disulfonic Acid

3-Hydroxy-4-phenylazo-naphthalene-2,7-disulfonic acid is a fascinating compound that plays a significant role in various fields, particularly in the realm of dyes and pigments. Here are some intriguing facts about this compound:

  • Azo Dye Significance: This compound belongs to the azo dye family, which is characterized by the presence of the azo group (–N=N–). Azo dyes are renowned for their vibrant colors and are widely used in the textile industry for dyeing fabrics.
  • Application in Analytical Chemistry: Due to its ability to form complexes with metal ions, 3-hydroxy-4-phenylazo-naphthalene-2,7-disulfonic acid is often utilized in analytical chemistry as a reagent for detecting particular metal ions, enhancing the accuracy of various analyses.
  • Biological Relevance: This compound has been studied for its potential interactions in biological systems, including its efficacy as a reagent in colorimetric assays, which can quantify biological molecules based on color changes.
  • Environmental Considerations: The synthesis and use of azo dyes raised environmental concerns due to the potential release of carcinogenic amines. Thus, research is underway to identify safer alternatives and methods of dye production.
  • Chemical Versatility: The sulfonic acid groups present in its structure enhance the compound's water solubility and reactivity, making it a versatile building block for synthesizing more complex chemical structures.

The chemical landscape surrounding 3-hydroxy-4-phenylazo-naphthalene-2,7-disulfonic acid is not only intriguing because of its applications but also due to the ongoing research aimed at improving its environmental and safety profiles. As we continue to understand this compound better, we expand our ability to utilize it effectively and responsibly in various industrial applications.

Synonyms
SCHEMBL933794
CHEMBL2010425
SCHEMBL16691181
NCI60_004064
2-(2-hydroxy-3,6-disulpho-1-naphthylazo)-benzene