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Orange G

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Identification
Molecular formula
C16H12N2O7S
CAS number
1936-15-8
IUPAC name
4-hydroxy-3-[(2-hydroxy-1-naphthyl)azo]benzenesulfonic acid
State
State
Orange G is typically in a solid state at room temperature, existing as a crystalline powder.
Melting point (Celsius)
300.00
Melting point (Kelvin)
573.00
Boiling point (Celsius)
738.90
Boiling point (Kelvin)
1 012.00
General information
Molecular weight
452.44g/mol
Molar mass
452.3790g/mol
Density
1.5286g/cm3
Appearence
Orange G appears as an orange crystalline powder. It is commonly used as a dye, particularly in histology and cytology due to its intense coloration.
Comment on solubility

Solubility of 4-Hydroxy-3-[(2-Hydroxy-1-naphthyl)azo]benzenesulfonic Acid

The solubility characteristics of 4-hydroxy-3-[(2-hydroxy-1-naphthyl)azo]benzenesulfonic acid can be quite intriguing. This compound is known for its functionality as a dye intermediate and has several factors influencing its solubility:

  • Polarity: The presence of multiple hydroxy groups and a sulfonic acid group significantly enhances the molecule's polarity, leading to a better solubility in polar solvents.
  • pH Influence: As an acid, its solubility can increase in alkaline conditions where it exists mostly as its anionic form, increasing its affinity for water.
  • Temperature Dependence: Like many organic compounds, solubility may vary with temperature—generally, increasing temperature can lead to increased solubility in solvents.
  • Solvent Type: The compound is likely to be more soluble in water than in organic solvents due to its charged functional groups.

In summary, the solubility of 4-hydroxy-3-[(2-hydroxy-1-naphthyl)azo]benzenesulfonic acid is primarily determined by its polar structure and the surrounding conditions. Understanding these factors is essential for its application in various chemical processes.

Interesting facts

Interesting Facts About 4-Hydroxy-3-[(2-Hydroxy-1-naphthyl)azo]benzenesulfonic Acid

4-Hydroxy-3-[(2-hydroxy-1-naphthyl)azo]benzenesulfonic acid is a fascinating compound with a rich history and diverse applications. Here are some important points to consider:

  • Dye Properties: This compound is a prominent member of azo dyes, known for their vibrant colors. Azo compounds are characterized by the presence of the azo group (-N=N-), which imparts significant dyeing properties.
  • Applications in Textiles: Its ability to produce a variety of shades has made it a popular choice in the textile industry, where it is used to dye fabrics such as cotton and wool.
  • pH Indicator: 4-Hydroxy-3-[(2-hydroxy-1-naphthyl)azo]benzenesulfonic acid also functions as a pH indicator. The compound exhibits color changes at different pH levels, making it useful in various chemical analyses.
  • Biological Relevance: Some studies suggest that azo compounds like this one could exhibit antimicrobial properties. This opens avenues for potential applications in developing antiseptics or preservatives.
  • Environmental Considerations: As with many synthetic dyes, there are environmental concerns regarding azo dyes, particularly their biodegradability and the potential formation of carcinogenic aromatic amines upon degradation. Scientific efforts are ongoing to find safer alternatives.

In the words of the renowned chemist, "Chemistry is not just about molecules; it's about the stories they tell and the colors they bring to our world." This compound's multifaceted nature embodies that sentiment, as it plays a critical role in art, science, and industry alike.


Synonyms
3219-56-5
4-Hydroxy-3-(2-(2-hydroxy-1-naphthalenyl)diazenyl)benzenesulfonic acid
4-Hydroxy-3-[2-(2-hydroxy-1-naphthalenyl)diazenyl]benzenesulfonic acid
Benzenesulfonic acid, 4-hydroxy-3-[(2-hydroxy-1-naphthalenyl)azo]-
SCHEMBL3003884
CHEMBL2009321
SCHEMBL19322486
DTXSID00422844
DTXSID90862831
IGLJWNJJOFKOTF-UHFFFAOYSA-N
NCI60_000573
1-(2-hydroxy-5-sulfophenylazo)-2-naphthol
1-[(2-hydroxynaphthyl)azo]-2-hydroxybenzene-5-sulfonic acid
benzenesulfonic acid, 4-hydroxy-3-(2-hydroxynaphth-1-ylazo)-
4-Hydroxy-3-((2-hydroxynaphthalen-1-yl)diazenyl)benzenesulfonic acid
4-Hydroxy-3-[(2-hydroxynaphthalen-1-yl)diazenyl]benzene-1-sulfonic acid