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Orange G

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Identification
Molecular formula
C16H10N2O7S2Na2
CAS number
1936-15-8
IUPAC name
4-(2,4-dihydroxyphenyl)azobenzenesulfonic acid
State
State
In its pure form at room temperature, Orange G is a solid crystalline powder.
Melting point (Celsius)
300.00
Melting point (Kelvin)
573.00
Boiling point (Celsius)
-1.00
Boiling point (Kelvin)
-1.00
General information
Molecular weight
452.38g/mol
Molar mass
452.3750g/mol
Density
0.4921g/cm3
Appearence

Orange G appears as an orange to reddish-orange crystalline powder. It is a synthetic azo dye that has a vibrant coloration, making it useful in various applications such as staining in histology.

Comment on solubility

Solubility of 4-(2,4-Dihydroxyphenyl)azobenzenesulfonic Acid

The solubility of 4-(2,4-dihydroxyphenyl)azobenzenesulfonic acid, commonly known as a sulfonated azo dye, is a crucial property that influences its application in various fields, including dyeing and biochemical studies. This compound exhibits unique solubility characteristics largely due to the presence of functional groups that interact favorably with water molecules.

  • Polarity: The sulfonic acid group (-SO3H) contributes significantly to the compound's polarity, enhancing its ability to dissolve in water.
  • Hydrogen Bonding: The hydroxyl groups (-OH) present in the structure can form hydrogen bonds with water, further increasing solubility.
  • pH Dependence: The solubility of this compound can vary with pH changes. Under acidic conditions, the sulfonic acid group remains protonated, potentially reducing solubility, while in neutral to basic conditions, it ionizes, increasing solubility.
  • Temperature Effects: Increasing temperature often leads to enhanced solubility for many organic compounds, including azo dyes, due to increased molecular motion.

As the renowned chemist Linus Pauling once said, "The secret of a good dye lies in its solubility." The solubility dynamics of 4-(2,4-dihydroxyphenyl)azobenzenesulfonic acid illustrate this principle well, showcasing the interplay between molecular structure and solubility.

Overall, understanding the solubility of this compound is vital for optimizing its application in industries seeking effective and efficient use of dyes.

Interesting facts

Interesting Facts about 4-(2,4-dihydroxyphenyl)azobenzenesulfonic acid

4-(2,4-dihydroxyphenyl)azobenzenesulfonic acid is a fascinating compound that showcases the intricate relationship between organic chemistry and various applications in science and industry. Here are some intriguing aspects of this compound:

  • Structure and Stability: The compound features an azo group (-N=N-) that connects two aromatic rings. This structural feature imparts both color and stability, making it useful in various dye applications.
  • Versatile Applications: Due to its aromatic sulfonic acid group, this compound is an important intermediate in the synthesis of dyes, particularly in the textile industry. It can also be employed in biological applications as a reagent or marker.
  • pH Indicator: The presence of the hydroxyl groups makes it a candidate for use as a pH indicator. These functional groups can affect the compound’s color at different pH levels, allowing for applications in pH-sensitive environments.
  • Biocompatibility: The hydroxyl groups contribute to the compound's potential biocompatibility, which is valuable in biomedical research for developing drug delivery systems or diagnostic agents.
  • Research and Development: Ongoing studies explore the compound's reactive properties and potential modifications, leading to new derivatives with enhanced performance in various applications, from pharmaceuticals to advanced materials.

This compound exemplifies the vital role that chemical structure plays in determining the chemical and physical properties and underscores the connections between basic research and applied sciences.

Synonyms
2050-34-2
4-(2-(2,4-Dihydroxyphenyl)diazenyl)benzenesulfonic acid
4-[2-(2,4-Dihydroxyphenyl)diazenyl]benzenesulfonic acid
4-((2,4-Dihydroxyphenyl)azo)benzenesulphonic acid
Acid Orange 6 free acid
Tropaeoline
SW441JGO0K
4-[(2,4-dihydroxyphenyl)diazenyl]benzenesulfonic acid
4-((2,4-Dihydroxyphenyl)diazenyl)benzenesulfonic acid
Benzenesulfonic acid, 4-((2,4-dihydroxyphenyl)azo)-
Tropaolin 0
C.I. ACID ORANGE 6 (FREE ACID)
4-[(2,4-Dihydroxyphenyl)azo]benzenesulfonic acid
4-[(2,4-Dihydoxyphenyl)azo]-1-benzenesulfonic acid-
Benzenesulfonic acid, 4-[2-(2,4-dihydroxyphenyl)diazenyl]-
4-[(1E)-2-(2,4-dihydroxyphenyl)diazen-1-yl]benzene-1-sulfonic acid
NSC10441
UNII-SW441JGO0K
4-[(E)-(2,4-dihydroxyphenyl)diazenyl]benzenesulfonic acid
4-[2-(2,4-Dihydroxyphenyl)diazenyl]benzenesulfonic Acid; 2,4-Dihydroxyazobenzene-4'-sulfonic Acid; 4-(2,4-Dihydroxyphenylazo)benzenesulfonic Acid; p-[(Dihydroxyphenyl)azo]benzenesulfonic Acid
EINECS 218-087-0
AI3-08837
C.I. Acid Orange 6 parent
SCHEMBL112101
DTXSID00862165
CHEBI:169787
MHKGJUOEEHNBLE-UHFFFAOYSA-N
BBL010715
STK525933
2,4-Dihydroxyazobenzol-4'-sulfosaure
AKOS005459291
2,4-dihydroxyazobenzene-4'-sulfonic acid
VS-02638
2',4'-Dihydroxyazobenzene-4-sulfonic acid
NS00082330
4-(2,4-DIHYDROXYPHENYLAZO)BENZENESULFONIC ACID
4-[(2,4-dihydroxyphenyl)diazenyl]benzenesulonic acid
4-[(E)-(2,4-dihydroxyphenyl)azo]benzenesulfonic acid
Q27289426
BENZENESULFONIC ACID, P-((DIHYDROXYPHENYL)AZO)-
BENZENESULFONIC ACID, P-((2,4-DIHYDROXYPHENYL)AZO)-
4-[2-(2,4-dihydroxyphenyl)diazen-1-yl]benzene-1-sulfonic acid