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Carmoisine

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Identification
Molecular formula
C20H12N2Na2O7S2
CAS number
3567-69-9
IUPAC name
disodium;6-hydroxy-5-(3-sulfonatophenyl)azo-naphthalene-2-sulfonate
State
State

At room temperature, Carmoisine is in a solid state, typically in powder form. It is stable under normal conditions and should be stored in a cool, dry place to maintain its integrity.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.00
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
502.44g/mol
Molar mass
502.4360g/mol
Density
1.7000g/cm3
Appearence

Carmoisine typically appears as a deep red or maroon powder. It is used as a synthetic food dye and is often found in a powdered form but may also be available in liquids for industrial applications. The color can vary slightly depending on concentration and medium, but it is known for its vivid appearance.

Comment on solubility

Solubility of Disodium 6-Hydroxy-5-(3-sulfonatophenyl)azo-naphthalene-2-sulfonate

Disodium 6-hydroxy-5-(3-sulfonatophenyl)azo-naphthalene-2-sulfonate, commonly referred to as a dye compound, exhibits some intriguing solubility characteristics:

  • Polarity: This compound has a significant number of sulfonate groups (–SO3⁻), which enhance its polarity and solubility in water.
  • Solvent Compatibility: It is highly soluble in polar solvents, particularly water, making it suitable for applications in aqueous solutions.
  • Temperature Influence: The solubility can vary with temperature; generally, higher temperatures may increase solubility.
  • Concentration Effects: At high concentrations, the solubility might reach a limit, resulting in saturation, where additional material fails to dissolve.

As a rule of thumb, compounds with multiple ionic or polar functional groups like disodium and numerous sulfonate functionalities tend to have high solubility in water, whereas nonpolar analogs would be less soluble. Therefore, disodium 6-hydroxy-5-(3-sulfonatophenyl)azo-naphthalene-2-sulfonate stands out for its practical utility in various aqueous applications.

Interesting facts

Interesting Facts about Disodium 6-Hydroxy-5-(3-Sulfonatophenyl)Azo-Naphthalene-2-Sulfonate

Disodium 6-hydroxy-5-(3-sulfonatophenyl)azo-naphthalene-2-sulfonate, often referred to for its dual functions in various fields, exhibits unique properties that make it important in scientific research and industrial applications. Here are some fascinating insights:

  • Versatile Dye: This compound is primarily known as a textile dye, specifically in the realm of azo dyes. Azo dyes are characterized by the presence of the azo group (-N=N-), which imparts vibrant colors to fabrics.
  • pH Indicator: The compound's structural characteristics allow it to function as an effective pH indicator. It changes color in response to shifts in pH, often used in titrations and chemical analysis.
  • Environmental Impact: Like many azo compounds, it is essential to monitor the environmental impact due to its potential toxicity and the formation of carcinogenic aromatic amines upon degradation.
  • Biotechnology Applications: Researchers have utilized this compound in various biochemical assays due to its reactivity with proteins and other biomolecules, providing a means of detecting and quantifying biological interactions.
  • Colorimetric Analysis: Its intense coloration allows for colorimetric analysis, making it a favored reagent in laboratories for quantitative measurements.

With its diverse applications, Disodium 6-hydroxy-5-(3-sulfonatophenyl)azo-naphthalene-2-sulfonate is a prime example of how chemical compounds can intersect with various fields, demonstrating the interconnectedness of chemistry, biology, and environmental science.

As the saying goes, "Color is the keyboard, the eye is the harmonizer, and the soul is the piano with many strings," illuminating how crucial compounds like this one are in connecting our understanding of nature with practical applications.

Synonyms
Food orange 2
2347-72-0
C.I. FOOD ORANGE 2
CI 15980
C.I. 15980
EINECS 219-073-7
35HF83708U
DTXSID90893685
disodium 6-hydroxy-5-[(3-sulphonatophenyl)azo]naphthalene-2-sulphonate
FOOD ORANGE 2 (E 111)
Disodium 6-hydroxy-5-((3-sulphonatophenyl)azo)naphthalene-2-sulphonate
Disodium 6-hydroxy-5-((3-sulfophenyl)azo)-2-naphthalenesulfonate
2-Naphthalenesulfonic acid, 6-hydroxy-5-((3-sulfophenyl)azo)-, disodium salt
2-Naphthalenesulfonic acid, 6-hydroxy-5-[(3-sulfophenyl)azo]-, disodium salt
2-NAPHTHALENESULFONIC ACID, 6-HYDROXY-5-(2-(3-SULFOPHENYL)DIAZENYL)-, SODIUM SALT (1:2)
2-Naphthalenesulfonic acid, 6-hydroxy-5-[2-(3-sulfophenyl)diazenyl]-, sodium salt (1:2)
CI 15980 [INCI]
DTXCID801323716
2-Naphthalenesulfonic acid, 6-hydroxy-5-(3-sulfophenyl)azo-, disodium salt
219-073-7
disodium;6-hydroxy-5-[(3-sulfonatophenyl)diazenyl]naphthalene-2-sulfonate
2-Naphthalenesulfonicacid, 6-hydroxy-5-[2-(3-sulfophenyl)diazenyl]-, sodium salt (1:2)
85283-70-1
UNII-35HF83708U
EINECS 286-599-1
SCHEMBL342135
SCHEMBL1507664
FABGVTFMFVQCBO-DDVLFWKVSA-L
6-Hydroxy-5-((3-sulphophenyl)azo)naphthalene-2-sulphonic acid, sodium salt
DB-230277
E 111
NS00013480
Q929052
6-Hydroxy-5-((3-sulfophenyl)azo)-2-naphthalenesulfonic acid, disodium salt
6-Hydroxy-5-[(3-sulfophenyl)azo]naphthalene-2-sulfonic acid,sodium salt
DISODIUM 6-HYDROXY-5-((3-SULFOPHENYL)AZO)-2- NAPHTHALENESULFONATE