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Acid Red 88

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Identification
Molecular formula
C22H14N4O7S2
CAS number
1658-56-6
IUPAC name
4-amino-3-[4-[4-[(1-amino-4-sulfo-2-naphthyl)azo]phenyl]phenyl]azo-naphthalene-1-sulfonic acid
State
State

At room temperature, Acid Red 88 is a solid. It is typically available as a powder and is used in its solid form for industrial applications, primarily in dyeing processes.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.15
Boiling point (Celsius)
530.00
Boiling point (Kelvin)
803.15
General information
Molecular weight
523.49g/mol
Molar mass
523.4900g/mol
Density
1.4900g/cm3
Appearence

Acid Red 88 is a red powder. It is commonly used as a dye and is characterized by its deep red hue in both powder form and in solution.

Comment on solubility

Solubility of 4-amino-3-[4-[4-[(1-amino-4-sulfo-2-naphthyl)azo]phenyl]phenyl]azo-naphthalene-1-sulfonic acid

The solubility of 4-amino-3-[4-[4-[(1-amino-4-sulfo-2-naphthyl)azo]phenyl]phenyl]azo-naphthalene-1-sulfonic acid is influenced by several factors due to its complex structure. This compound features multiple functional groups, which impact its interaction with solvents.

Key Points regarding Solubility:

  • Polar Character: The presence of sulfonic acid and amino groups suggests a high degree of polarity, often leading to increased solubility in polar solvents such as water.
  • Aqueous Solubility: Generally, compounds with sulfonic acid groups exhibit greater solubility in water, making this compound likely to be soluble or at least partially soluble in aqueous solutions.
  • pH Dependency: Solubility may vary with pH levels, as the protonation of amino groups can affect the overall charge and solubility of the molecule.
  • Solvent Effects: In non-polar solvents (e.g., hexane), the solubility is expected to be very low due to the lack of interactions with non-polar environments.

In conclusion, while the compound shows potential for water solubility due to its functional groups, the exact solubility can be influenced by environmental conditions such as temperature and pH. For precise applications or formulation, experimental solubility measurements are recommended.

Interesting facts

Interesting Facts about 4-amino-3-[4-[4-[(1-amino-4-sulfo-2-naphthyl)azo]phenyl]phenyl]azo-naphthalene-1-sulfonic acid

This compound is a fascinating example of an azo dye, which is known for its vibrant colors and diverse applications. Typically utilized in the textile industry, it boasts several noteworthy characteristics:

  • Azo Structure: The presence of azo groups (–N=N–) is characteristic of azo dyes. These groups are essential for the compound's vivid coloration and are crucial in dyeing processes.
  • Functional Groups: With multiple sulfonic acid functional groups, this compound is often highly soluble in water, allowing it to be easily used in various aqueous applications.
  • Use in Textiles: Its prominent use lies in the dyeing of fabrics, where it provides a stable color that withstands laundering and exposure to environmental conditions.
  • Environmental Considerations: As with many azo compounds, there are regulatory concerns due to some azo dyes decompounding into carcinogenic substances. This highlights the importance of developing and implementing safe usage guidelines in industries.
  • Analytical Chemistry: Azo dyes like this compound serve as vital markers in pharmaceutical and biochemical assays, aiding in detecting and quantifying particular analytes.

Overall, 4-amino-3-[4-[4-[(1-amino-4-sulfo-2-naphthyl)azo]phenyl]phenyl]azo-naphthalene-1-sulfonic acid exemplifies the balance between utility and safety in the field of chemistry. Its applications underscore the intersection of creativity and scientific inquiry, making it a valuable subject of study for chemists and industry professionals alike.

Synonyms
Congo Red free acid
8KB6BS2FOH
C.I. Direct Red 28 parent
UNII-8KB6BS2FOH
14684-01-6
3,3'-(biphenyl-4,4'-diyldidiazene-2,1-diyl)bis(4-aminonaphthalene-1-sulfonic acid)
CHEBI:38217
Kongorot
C.I. DIRECT RED 28 FREE ACID
Cosmos Red
Benzo Congo Red
Cotton Red B
Cotton Red C
Direct Red C
Direct Red R
Direct Red Y
1-Naphthalenesulfonic acid, 3,3'-((1,1'-biphenyl)-4,4'-diylbis(2,1-diazenediyl))bis(4-amino-
1-Naphthalenesulfonic acid, 3,3'-((1,1'-biphenyl)-4,4'-diylbis(azo))bis(4-amino-
3,3'-((1,1'-Biphenyl)-4,4'-diylbis(2,1-diazenediyl))bis(4-amino-1-naphthalenesulfonic acid)
CI Direct Red 28
NSC7232
CHEMBL116955
SCHEMBL1254806
SCHEMBL2583894
CHEMBL1206150
DTXSID0048428
4-amino-3-[[4-[4-[(1-amino-4-sulfonaphthalen-2-yl)diazenyl]phenyl]phenyl]diazenyl]naphthalene-1-sulfonic acid
CI 22120
PD014632
NS00097734
Q27104437
1-Naphthalenesulfonic acid, 3, 3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis[4-amino-
4-amino-3-[(E)-[4-[4-[(E)-(1-amino-4-sulfo-2-naphthyl)azo]phenyl]phenyl]azo]naphthalene-1-sulfonic acid
4-azanyl-3-[(~{E})-[4-[4-[(~{E})-(1-azanyl-4-sulfo-naphthalen-2-yl)diazenyl]phenyl]phenyl]diazenyl]naphthalene-1-sulfonic acid
YA9