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Orange I

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Identification
Molecular formula
C12H11N2O3S
CAS number
523-44-4
IUPAC name
4-(4-aminophenyl)azobenzenesulfonic acid
State
State

At room temperature, Orange I is in the solid state, forming orange-red crystals or powder.

Melting point (Celsius)
210.00
Melting point (Kelvin)
483.15
Boiling point (Celsius)
318.00
Boiling point (Kelvin)
591.15
General information
Molecular weight
350.36g/mol
Molar mass
350.3600g/mol
Density
1.2600g/cm3
Appearence

Orange I appears as an orange-red dye. It is typically provided as an odourless, red crystalline powder or solid.

Comment on solubility

Solubility of 4-(4-aminophenyl)azobenzenesulfonic acid

4-(4-aminophenyl)azobenzenesulfonic acid is a chemical compound with notable solubility characteristics that are essential for its applications in various fields. The solubility of this compound can be influenced by several factors, including:

  • pH of the solution: The presence of the sulfonic acid group (-SO3H) enhances its solubility in water, especially in acidic conditions.
  • Temperature: Generally, an increase in temperature can lead to greater solubility for many organic compounds, including this azobenzene derivative.
  • Polar solvents: It is more soluble in polar solvents compared to non-polar solvents due to the ionic nature of the sulfonic group.

To summarize, the solubility of 4-(4-aminophenyl)azobenzenesulfonic acid is primarily dictated by its ionic groups, making it highly soluble in water and polar media. As stated, "Solubility is not just a property but a vital aspect that determines the usability of compounds." Understanding these properties can enhance its effectiveness in applications such as dyes and pigments.

Interesting facts

Interesting Facts about 4-(4-Aminophenyl)azobenzenesulfonic Acid

4-(4-Aminophenyl)azobenzenesulfonic acid, commonly known as an azo dye, is an intriguing compound that plays a significant role in the field of organic chemistry and dye production. Here are some fascinating insights:

  • Azo Compounds: This compound belongs to the class of azo compounds which contain the functional group –N=N– (azo group). They are renowned for their vibrant colors and are widely used in textiles, plastics, and food products.
  • Applications: A key application of this dye lies in the textile industry, where it is used to impart color to fabrics. Additionally, it finds use in the development of pH indicators and in biological studies as a reagent.
  • Environmental Considerations: The production and use of azo dyes have raised environmental concerns due to their potential to generate carcinogenic amines upon degradation. Hence, regulatory measures are being adopted to monitor and control azo dye usage.
  • Research Significance: This compound is often utilized in research for studying dye-sensitized solar cells (DSSCs) and organic solar cells, where it serves as an intriguing candidate for enhancing light absorption and conversion efficiency.
  • Synthetic Pathways: The synthesis of 4-(4-aminophenyl)azobenzenesulfonic acid typically involves diazotization and coupling reactions, demonstrating the versatility of organic synthesis techniques that chemists employ to create complex structures.

In conclusion, 4-(4-aminophenyl)azobenzenesulfonic acid is more than just a compound; it represents a bridge between art and science, highlighting the interplay of chemistry in everyday life and industrial processes. As scientists continue to explore its potential, this compound remains a subject of great interest in both academic and applied research.

Synonyms
104-23-4
4'-Aminoazobenzene-4-sulphonic acid
C.I. Food Yellow 6
4-Aminoazobenzene-4'-sulfonic acid
C.I. Food Yellow 6 (VAN)
Benzenesulfonic acid, 4-((4-aminophenyl)azo)-
G5U4TU950K
NSC-4704
Benzenesulfonic acid, 4-[(4-aminophenyl)azo]-
DTXSID4041731
J806K
4-(4'-SULFOPHENYLAZO)ANILINE
Benzenesulfonic acid, 4-(2-(4-aminophenyl)diazenyl)-
Benzenesulfonic acid, 4-[2-(4-aminophenyl)diazenyl]-
DTXCID50809661
203-187-9
4-((4-aminophenyl)diazenyl)benzenesulfonic acid
4'-Aminoazobenzene-4-sulfonic acid
Aminoazobenzenesulfonic acid
C.I. 13011 (Free acid)
4-[(4-aminophenyl)diazenyl]benzenesulfonic acid
4'-Sulfo-4-aminoazobenzene
p-Aminoazobenzene-4'-sulfonic acid
p-((p-Aminophenyl)azo)benzenesulfonic acid
(E)-4-((4-aminophenyl)diazenyl)benzenesulfonic acid
4-(4-Sulfophenylazo)aniline
1149431-33-3
p-[(p-Aminophenyl)azo]benzenesulfonic acid
NSC 4704
4-Aminoazobenzene-4'-sulphonic acid
EINECS 203-187-9
BRN 0753101
UNII-G5U4TU950K
4-(4-Aminophenylazo)benzenesulfonic acid
Benzenesulfonic acid, p-((p-aminophenyl)azo)-
EC 203-187-9
2-16-00-00168 (Beilstein Handbook Reference)
SCHEMBL1485997
NSC4704
HY-D0273
MFCD00035778
4''-Aminoazobenzene-4-sulphonic Acid
AKOS015897260
p-(p-Aminophenylazo)benzenesulfonic acid
AS-15420
p-(p-aminophenylazo)benzene sulfonic acid
CS-0010176
NS00006633
4-[(E)-(4-aminophenyl)azo]benzenesulfonic acid
4-[(E)-(4-aminophenyl)diazenyl]benzenesulfonic acid
Q26840855
Q27278800