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Tartrazine

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Identification
Molecular formula
C16H9N4Na2O9S2
CAS number
1934-21-0
IUPAC name
disodium;3-[[4-[4-(4-hydroxyphenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonate
State
State

At room temperature, tartrazine is typically found in solid form as a powder. It can be dissolved in water for various applications.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.00
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
534.36g/mol
Molar mass
534.3600g/mol
Density
1.6530g/cm3
Appearence

Tartrazine is a synthetic yellow azo dye. The compound appears as a bright yellow powder. It is widely used as a food coloring and its vivid yellow color is often associated with various beverages, candies, and similar products.

Comment on solubility

Solubility of Disodium 3-[[4-[4-(4-hydroxyphenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonate

This compound is characterized by its complex structure, which plays a significant role in its solubility profile. Being a disodium salt, it's important to consider several key factors that influence solubility:

  • Ionic Nature: As a disodium salt, it generally exhibits improved solubility in polar solvents, particularly water, due to the presence of ionic bonds.
  • Sulfonate Groups: The presence of sulfonate groups (-SO3^-) enhances solubility by increasing the ionic character and promoting interactions with water molecules.
  • Molecular Structure: Its large and complex organic structure may create steric hindrance, potentially limiting solubility to some degree in non-polar solvents.
  • Temperature Dependency: Solubility may vary with temperature; typically, an increase in temperature can lead to an increase in solubility for most salts, including this compound.

In conclusion, while disodium 3-[[4-[4-(4-hydroxyphenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonate is expected to be soluble in water due to its ionic nature and the presence of sulfonate groups, the extent of its solubility may still be affected by its bulky molecular structure and the surrounding environmental conditions. Therefore, one must consider these aspects when predicting and testing solubility in practical applications.

Interesting facts

Interesting Facts about Disodium 3-[[4-[4-(4-Hydroxyphenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonate

This compound is a fascinating member of the azo dye family, renowned for its vibrant colors and applications in various fields. Here are some compelling points of interest regarding this compound:

  • Dyeing Power: Azo compounds like this one are commonly used in textile dyeing due to their ability to produce a diverse range of shades. The presence of multiple aromatic rings contributes to their substantial color intensity.
  • Biological Relevance: The unique structure allows for potential applications in biological systems. Some azo dyes have been explored for their roles as pH indicators or in *bioimaging* due to their notable changes in absorbance with pH variations.
  • Environmental Impact: Though these compounds are effective in coloring, certain azo dyes must be handled with caution. Some can be toxic or carcinogenic, leading to strict regulations regarding their use. This necessitates ongoing research into safer alternatives.
  • Synthetic Versatility: The synthesis of azo dyes can be manipulated to create derivatives with different functional groups. This versatility means that similar compounds can exhibit a myriad of coloring properties and reactivities, broadening their applicability.
  • Cultural Significance: The use of azo dyes has ancient roots, with their origins tracing back to natural dyes derived from plants and insects. Modern synthetic dyes, such as this compound, represent a significant advancement in dye technology.

In summary, disodium 3-[[4-[4-(4-hydroxyphenyl)azophenyl]phenyl]hydrazono]-4-imino-5-oxo-6-(phenylhydrazono)naphthalene-2,7-disulfonate not only showcases the intricate nature of chemical synthesis but also bridges art, science, and environmental considerations.