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Orange G

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Identification
Molecular formula
C16H11N2NaO5S
CAS number
1936-15-8
IUPAC name
6-hydroxy-5-(4-methoxyphenyl)azo-naphthalene-2-sulfonic acid
State
State

Orange G is typically found in a solid state at room temperature. It is stable and retains its color when dry.

Melting point (Celsius)
198.00
Melting point (Kelvin)
471.15
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
452.38g/mol
Molar mass
452.3740g/mol
Density
1.4600g/cm3
Appearence

Orange G appears as an orange to dark orange powder. It is often used as a dye and is known for its bright, vivid hue, common in biological stains and textile applications.

Comment on solubility

Solubility of 6-hydroxy-5-(4-methoxyphenyl)azo-naphthalene-2-sulfonic acid

The solubility of 6-hydroxy-5-(4-methoxyphenyl)azo-naphthalene-2-sulfonic acid is an intriguing aspect of its chemical properties. As a sulfonic acid derivative, it typically exhibits notable water solubility due to the presence of the sulfonate group, which tends to enhance ionic interactions with water molecules.

Here are some key points regarding its solubility:

  • Water Solubility: Compounds with sulfonic acids are generally soluble in water, which implies that this compound likely dissolves well in aqueous solutions.
  • Organic Solvents: The presence of the methoxy group could introduce some degree of solubility in organic solvents, though this can be variable and might depend on the solvent's polarity.
  • pH Dependence: The solubility may also vary significantly with pH, as the ionization state of the sulfonic acid can change, affecting its overall solubility in various environments.

In conclusion, while the specific solubility values in different solvents or conditions might require further empirical data, the presence of sulfonic acid groups and additional substituents suggests a favorable solubility profile in water and possibly in some organic solvents.

Interesting facts

Interesting Facts about 6-hydroxy-5-(4-methoxyphenyl)azo-naphthalene-2-sulfonic acid

6-hydroxy-5-(4-methoxyphenyl)azo-naphthalene-2-sulfonic acid, commonly referred to in the scientific community by its abbreviated name, is a fascinating azo compound with a wealth of applications and unique characteristics. Here are some noteworthy points that showcase its significance:

  • Industrial Use: This compound is primarily used as a dye, particularly in textile and paper industries, where it imparts vibrant colors and stability.
  • Analytical Chemistry: Due to its distinct color changes, it serves as an important reagent in various analytical chemistry methods, including spectrophotometry.
  • Biological Applications: Its structure allows it to be utilized in biochemical studies, especially in researching reactions involving azo compounds and their potential effects on living organisms.
  • Environmental Impact: The synthesis of azo dyes, including this compound, has raised environmental concerns over the years due to their potential toxicity. Hence, ongoing research is directed towards understanding and mitigating such risks.
  • Structure-Activity Relationship: The presence of both hydroxyl (-OH) and sulfonic acid (-SO₃H) groups enhances its solubility and reactivity, making it a compound of interest when studying structure-activity relationships in drug design.

As with many azo compounds, the vivid colors and complex structures make 6-hydroxy-5-(4-methoxyphenyl)azo-naphthalene-2-sulfonic acid an intriguing subject for both practical applications and theoretical studies. As stated by one prominent chemist, "The interplay of color and chemistry opens doors to endless possibilities." Exploring these compounds further could lead to breakthroughs in both industrial and environmental chemistry.

Synonyms
27959-50-8
SCHEMBL1096353
SCHEMBL1096355
DTXSID70782785
5-[2-(4-Methoxyphenyl)hydrazinylidene]-6-oxo-5,6-dihydronaphthalene-2-sulfonic acid