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Orange G

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Identification
Molecular formula
C16H10N2Na2O7S2
CAS number
1936-15-8
IUPAC name
4-hydroxy-3-(2-methoxy-5-methyl-phenyl)azo-naphthalene-2,6-disulfonic acid
State
State

Solid: Orange G is typically found as a solid at room temperature.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.00
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
452.38g/mol
Molar mass
452.3790g/mol
Density
1.4375g/cm3
Appearence

Orange G appears as an orange to reddish-orange powder. It is commonly used as a dye and shows a bright orange color when dissolved in water, highlighting its utility in various staining applications in histology and the textile industry.

Comment on solubility

Solubility of 4-hydroxy-3-(2-methoxy-5-methyl-phenyl)azo-naphthalene-2,6-disulfonic acid

The solubility of 4-hydroxy-3-(2-methoxy-5-methyl-phenyl)azo-naphthalene-2,6-disulfonic acid, popularly known as a dye intermediate, is notably affected by its functional groups and structure. This compound contains both hydrophilic and hydrophobic components, which greatly influences its solubility characteristics.

Factors Influencing Solubility:

  • Presence of Sulfonic Acid Groups: The two sulfonic acid groups (-SO3H) increase the compound's ability to interact with water, enhancing its solubility in aqueous solutions.
  • Methoxy Group: The methoxy (-OCH3) substituent can also contribute to the solubility due to its electron-donating property, which can stabilize the molecule within the solvent.
  • Hydrophobic Phenyl Group: The presence of the phenyl moiety introduces a hydrophobic section, which may limit solubility in polar solvents to some extent.

In general, you can expect this compound to have good solubility in polar solvents, specifically water, due to its high number of polar functional groups. However, the solubility might be reduced in nonpolar solvents due to the presence of hydrophobic components. As a result, the compound is often utilized in applications where water solubility is advantageous.

To summarize, the solubility characteristics of this dye can be viewed as a balance between:

  • Hydrophilic Nature: Enhanced by sulfonic acid groups
  • Hydrophobic Phenyl Groups: Potentially limiting in nonpolar solvents

Thus, understanding these interactions can be key when considering its use in various chemical and industrial applications.

Interesting facts

Interesting Facts About 4-hydroxy-3-(2-methoxy-5-methyl-phenyl)azo-naphthalene-2,6-disulfonic Acid

This compound, widely recognized as an azo dye, is celebrated for its vibrant colors and significant applications in various industries. Here are some intriguing aspects of this compound:

  • Azo Dyes: It belongs to the class of azo dyes, which are characterized by the presence of the azo group (–N=N–). These dyes are known for their excellent colorfastness properties, making them ideal for textile dyeing and printing.
  • Chemical Structure: The complex structure of this compound includes not just the azo group, but also multiple functional groups such as hydroxyl and sulfonic acid groups. These functional groups enhance its solubility and application potential.
  • Environmental Impact: Due to the wide use of azo dyes in the textile industry, there is an ongoing focus on their environmental impact. Researchers are actively studying the degradation of azo compounds in wastewater, as some azo dyes can release carcinogenic amines upon breakdown.
  • Historical Significance: Azo dyes have a rich history, originating in the late 19th century. They marked a revolution in dye technology due to their diverse range of colors and ability to be synthesized.
  • Application in Analytical Chemistry: This compound has also found a place in analytical chemistry as a reagent. It can be utilized in the detection of various metal ions through colorimetric methods.

In summary, 4-hydroxy-3-(2-methoxy-5-methyl-phenyl)azo-naphthalene-2,6-disulfonic acid is not just a chemical compound; it is a symbol of the intricate intersection between chemistry, industry, and environmental science. As we continue to explore its properties and applications, this compound reminds us of the balance that must be struck between innovation and environmental stewardship.

Synonyms
DTXSID80863635
3-[2-(2-Methoxy-5-methylphenyl)hydrazinylidene]-4-oxo-3,4-dihydronaphthalene-2,6-disulfonic acid