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Sunset Yellow FCF

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Identification
Molecular formula
C18H14N2Na2O7S2
CAS number
2783-94-0
IUPAC name
7-hydroxy-8-[2-methyl-4-[3-methyl-4-[4-(p-tolylsulfonyloxy)phenyl]azo-phenyl]phenyl]azo-naphthalene-1,3-disulfonic acid
State
State
At room temperature, Sunset Yellow FCF is typically found as a solid. It is often supplied as a powder and can be dissolved in water, where it colors the solution yellow to orange depending on concentration.
Melting point (Celsius)
300.00
Melting point (Kelvin)
573.00
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
452.37g/mol
Molar mass
452.3660g/mol
Density
0.9349g/cm3
Appearence
Sunset Yellow FCF appears as an orange-red powder. It is commonly used as a food dye and imparts a yellow to red hue in water-soluble applications. In its solid form, it may exhibit a vivid orange hue with a fine granulated or crystalline texture.
Comment on solubility

Solubility of 7-hydroxy-8-[2-methyl-4-[3-methyl-4-[4-(p-tolylsulfonyloxy)phenyl]azo-phenyl]phenyl]azo-naphthalene-1,3-disulfonic acid

The solubility of 7-hydroxy-8-[2-methyl-4-[3-methyl-4-[4-(p-tolylsulfonyloxy)phenyl]azo-phenyl]phenyl]azo-naphthalene-1,3-disulfonic acid is influenced by several key factors:

  • Functional Groups: The presence of multiple sulfonic acid groups on the molecule generally enhances its solubility in polar solvents such as water.
  • Hydrophobic Interactions: The incorporation of hydrophobic groups, like the p-tolylsulfonyloxy moiety, can affect solubility, causing the compound to exhibit variable solubility depending on solvent type.
  • pH Sensitivity: This compound may show changes in solubility with varying pH levels, particularly due to the acidic nature of the sulfonic acid groups that can ionize.

As a result, while 7-hydroxy-8-[2-methyl-4-[3-methyl-4-[4-(p-tolylsulfonyloxy)phenyl]azo-phenyl]phenyl]azo-naphthalene-1,3-disulfonic acid is likely soluble in water due to its acidic functionalities, it may exhibit limited solubility in non-polar solvents. Thus, understanding the solvent system is crucial for determining its practical use in various applications.

In summary:

  • Generally soluble in polar solvents
  • Influenced by pH and functional groups
  • Restricted solubility in non-polar solvents
Interesting facts

Interesting Facts about 7-hydroxy-8-[2-methyl-4-[3-methyl-4-[4-(p-tolylsulfonyloxy)phenyl]azo-phenyl]phenyl]azo-naphthalene-1,3-disulfonic acid

This compound, often referred to for its complex structure, belongs to a class of colorants known as azo dyes. These dyes are characterized by the presence of the azo group, -N=N-, which is crucial for their vibrant colors and various applications. Here are some fascinating aspects of this compound:

  • Versatility: Azo dyes are extensively used in textile, food, and cosmetics industries due to their ability to produce bright and vivid colors.
  • Structure and Function: The intricate arrangement of hydroxyl groups, methyl groups, and sulfonic acid provides this compound with unique solubility characteristics and reactivity, making it suitable for various applications.
  • Environmental Considerations: With growing concerns over environmental safety, azo dyes are under scrutiny for potential toxicity and environmental impact. Scientists are actively researching safer alternatives.
  • Analytical Chemistry: The presence of multiple functional groups in this compound makes it a suitable subject for analytical techniques like HPLC (High-Performance Liquid Chromatography) and UV-Vis spectroscopy.
  • Historical Significance: Azo compounds have a rich history, with some of the earliest synthetic dyes derived from natural sources dating back to the mid-19th century. This compound is a testament to the evolution of synthetic dyes.

The study of compounds like 7-hydroxy-8-[2-methyl-4-[3-methyl-4-[4-(p-tolylsulfonyloxy)phenyl]azo-phenyl]phenyl]azo-naphthalene-1,3-disulfonic acid not only highlights the innovation in synthetic chemistry but also emphasizes the need for sustainable practices in the chemical industry. As the field of dye chemistry evolves, understanding the properties and applications of such compounds remains crucial.

Synonyms
25317-45-7
8-((3,3'-Dimethyl-4'-((4-(((p-tolyl)sulphonyl)oxy)phenyl)azo)(1,1'-biphenyl)-4-yl)azo)-7-hydroxynaphthalene-1,3-disulphonic acid
C.I. Acid Red 114 parent
CHEMBL1624053
CHEMBL3306058
DTXSID1047994
SIGHAVOYMKYMPO-UHFFFAOYSA-N
NS00083459
8-((3,3'-Dimethyl-4'-((4-(tosyloxy)phenyl)diazenyl)-[1,1'-biphenyl]-4-yl)diazenyl)-7-hydroxynaphthalene-1,3-disulfonic acid
8-((3,3'-Dimethyl-4'-((4-(tosyloxy)phenyl)diazenyl)-[1,1'-biphenyl]-4-yl)diazenyl)-7-hydroxynaphthalene-1,3-disulfonicacid