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Tartrazine

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Identification
Molecular formula
C16H9N4Na3O9S2
CAS number
1934-21-0
IUPAC name
4-hydroxy-7-[[5-hydroxy-6-(2-methoxyphenyl)azo-7-sulfo-2-naphthyl]carbamoylamino]-3-(2-methyl-4-sulfo-phenyl)azo-naphthalene-2-sulfonic acid
State
State

At room temperature, Tartrazine is in the solid state, often in the form of powdered crystals. It is stable under ambient conditions and soluble in water, making it easy to dissolve for its various applications.

Melting point (Celsius)
0.00
Melting point (Kelvin)
0.00
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
534.37g/mol
Molar mass
534.3660g/mol
Density
0.8496g/cm3
Appearence

Tartrazine typically appears as a bright yellow powder. It is often used as a yellow dye and can provide vivid color in its applications, extending to foods, medications, and cosmetics. The shade of yellow may vary from pale yellow to bright lemon yellow based on the concentration and formulation.

Comment on solubility

Solubility of 4-hydroxy-7-[[5-hydroxy-6-(2-methoxyphenyl)azo-7-sulfo-2-naphthyl]carbamoylamino]-3-(2-methyl-4-sulfo-phenyl)azo-naphthalene-2-sulfonic acid

The solubility of complex compounds such as 4-hydroxy-7-[[5-hydroxy-6-(2-methoxyphenyl)azo-7-sulfo-2-naphthyl]carbamoylamino]-3-(2-methyl-4-sulfo-phenyl)azo-naphthalene-2-sulfonic acid can be influenced by various factors. Here are some key considerations:

  • Polarity: The molecule contains multiple functional groups, including sulfonic acid and hydroxyl groups, which generally enhance polarity and solubility in polar solvents like water.
  • Acid-Base Interactions: The presence of sulfonic acid groups may contribute to good water solubility through their ability to ionize in aqueous solutions.
  • Hydrogen Bonding: The hydroxyl and sulfonic groups can participate in hydrogen bonding, promoting solubility by stabilizing interactions with water molecules.
  • Temperature Effects: Solubility can increase with temperature; thus, higher temperatures might enhance the solubility of this compound in water.
  • Analogous Compounds: Similar azo compounds tend to exhibit varying solubilities based on their structural characteristics; thus, referring to known analogs can give insights into expected solubility.

In conclusion, while specific solubility data may not be readily available for this particular compound, its structural factors heavily suggest strong solubility in polar solvents. Researchers often find that understanding the underlying chemistry helps predict solubility behavior effectively.

Interesting facts

Interesting Facts about 4-Hydroxy-7-[[5-Hydroxy-6-(2-Methoxyphenyl)Azo-7-Sulfo-2-Naphthyl]Carbamoylamino]-3-(2-Methyl-4-Sulfo-Phenyl)Azo-Naphthalene-2-Sulfonic Acid

This compound is a fascinating example of a naphthalene-based azo dye, which has significant applications in various fields including textiles, pharmaceuticals, and analytical chemistry. With its complex structure and multiple functional groups, it displays unique properties that make it a subject of interest for chemists.

Key Highlights:

  • Dye Properties: Azo compounds like this one are known for their vibrant colors, stemming from the azo functional group (-N=N-). This specific compound can exhibit a variety of hues depending on the pH and solvation environment, making it useful in dyeing applications.
  • Biological Significance: The presence of sulfonic acid groups enhances the compound's solubility in water, which is critical for biological applications. Some studies suggest that sulfonated azo dyes may interact with biological macromolecules, offering insights into cellular processes.
  • Analytical Uses: This compound is also employed in analytical chemistry as a reagent for the detection of various metal ions and biomolecules. Its ability to form complexes is invaluable in colorimetric analysis.
  • Environmental Considerations: Azo dyes have been scrutinized due to their potential environmental impact and toxicity. Research into the degradation of such compounds is ongoing, aiming to develop safer alternatives and effective treatment methods for wastewater.

In summary, 4-hydroxy-7-[[5-hydroxy-6-(2-methoxyphenyl)azo-7-sulfo-2-naphthyl]carbamoylamino]-3-(2-methyl-4-sulfo-phenyl)azo-naphthalene-2-sulfonic acid is not just a complex chemical compound; it serves as a bridge between chemistry and various practical applications. The study of such compounds is essential for anyone interested in the realms of materials science, environmental chemistry, and the development of new colorants.

Synonyms
Direct Red 24 free acid
25188-08-3
CHEMBL1092083
NSC-47764
02750X7990
Amanil Fast Scarlet 4BA
C.I. Direct Red 24
NSC47764
C.I. 29185
RQOXTBNOVJMAHF-UHFFFAOYSA-N
DTXSID501023991
DIRECT RED 24 (FREE ACID)
EINECS 246-724-2
BDBM50316069
UNII-02750X7990
C.I. DIRECT RED 24 (FREE ACID)
C.I. Direct Red 24, (*Trisodium salt*)
Q27247527
2-Naphthalenesulfonic acid, 4-hydroxy-7-((((5-hydroxy-6-((2-methoxyphenyl)azo)-7-sulfo-2-naph- thalenyl)amino)carbonyl)amino)-3-((2-methyl-4-sulfophenyl)azo)
2-NAPHTHALENESULFONIC ACID, 4-HYDROXY-7-((((5-HYDROXY-6-((2-METHOXYPHENYL)AZO)-7-SULFO-2-NAPHTHALENYL)AMINO)CARBONYL)AMINO)-3-((2-METHYL-4-SULFOPHENYL)AZO)-
2-NAPHTHALENESULFONIC ACID, 4-HYDROXY-7-((((5-HYDROXY-6-(2-(2-METHOXYPHENYL)DIAZENYL)-7-SULFO-2-NAPHTHALENYL)AMINO)CARBONYL)AMINO)-3-(2-(2-METHYL-4-SULFOPHENYL)DIAZENYL)-
4-hydroxy-7-(3-(5-hydroxy-6-((2-methoxyphenyl)diazenyl)-7-sulfonaphthalen-2-yl)ureido)-3-((2-methyl-4-sulfophenyl)diazenyl)naphthalene-2-sulfonic acid
4-hydroxy-7-[[5-hydroxy-6-[(E)-(2-methyl-4-sulfo-phenyl)azo]-7-sulfo-2-naphthyl]carbamoylamino]-3-[(E)-(2-methoxyphenyl)azo]naphthalene-2-sulfonic acid
7-((((6-((o-Anisyl)azo)-5-hydroxy-7-sulpho-2-naphthyl)amino)carbonyl)amino)-4-hydroxy-3-((2-methyl-4-sulphophenyl)azo)naphthalene-2-sulphonic acid