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Amaranth

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Identification
Molecular formula
C20H11N2Na3O10S3
CAS number
915-67-3
IUPAC name
3-hydroxy-4-nitroso-naphthalene-2,7-disulfonic acid
State
State

Amaranth is typically encountered as a solid at room temperature. It is stable under normal conditions and easy to handle as a dry powder.

Melting point (Celsius)
120.00
Melting point (Kelvin)
393.15
Boiling point (Celsius)
345.00
Boiling point (Kelvin)
618.15
General information
Molecular weight
604.48g/mol
Molar mass
604.4860g/mol
Density
1.5300g/cm3
Appearence

Amaranth is an organic compound that typically appears as dark red to purple crystals or powder. It is known for its vibrant color, making it a popular choice in dyeing and staining applications.

Comment on solubility

Solubility of 3-hydroxy-4-nitroso-naphthalene-2,7-disulfonic acid

The solubility of 3-hydroxy-4-nitroso-naphthalene-2,7-disulfonic acid is an intriguing aspect of this compound, as it features multiple sulfonic acid groups that can significantly influence its solubility in various solvents. Here are some key points regarding its solubility:

  • Water Solubility: Due to the presence of two −SO₃H (sulfonic acid) groups, this compound is expected to be highly soluble in water. The strong ionic character of the sulfonic groups promotes hydrogen bonding and ion-dipole interactions with water molecules.
  • Solubility in Organic Solvents: Its solubility in organic solvents like ethanol or acetone may be limited. The polar nature of the sulfonic acid groups contrasts with the nonpolar characteristics of many organic solvents, often leading to lower solubility in such media.
  • pH Dependence: The solubility can be affected by the pH of the solution. At lower pH values, the sulfonic acids can remain protonated, whereas at neutral and higher pH, they will ionize, enhancing solubility further due to increased ionic interactions.

In conclusion, 3-hydroxy-4-nitroso-naphthalene-2,7-disulfonic acid displays a strong preference for aqueous environments owing to its ionic character, making it an important compound for various applications where water solubility is advantageous.

Interesting facts

Interesting Facts about 3-hydroxy-4-nitroso-naphthalene-2,7-disulfonic Acid

3-hydroxy-4-nitroso-naphthalene-2,7-disulfonic acid, often referred to by its more manageable name, is a fascinating chemical compound known for its vivid applications in various fields of science. Here are some intriguing insights:

  • Importance in Analytical Chemistry: This compound serves as a potent dye, specifically used in the development of colorimetric assays, which play a critical role in the detection of various chemical substances.
  • Biological Relevance: Due to its sulfonic acid groups, it exhibits significant biological activity and is studied for its potential uses in biological systems and environmental monitoring.
  • Dye Chemistry: As a dye, this compound can be utilized in modeling complex chemical reactions and is often used in studies related to photochemistry.
  • Structural Interest: The unique structure of 3-hydroxy-4-nitroso-naphthalene-2,7-disulfonic acid allows for intricate interactions with light, making it a subject of study in the field of material science, particularly in the development of new photonic materials.
  • Historical Context: This compound is part of a class of naphthalene derivatives that have sparked significant interest due to their utility in traditional and modern chemical applications, dating back to early dye synthesis in the 19th century.

Its multifaceted nature not only emphasizes its applications but also highlights the importance of understanding such compounds to innovate within chemical research and industry. As noted by chemists, "the depth of chemical behavior often lies in the subtleties of molecular structure."

In summary, the exploration of 3-hydroxy-4-nitroso-naphthalene-2,7-disulfonic acid not only enriches our knowledge in chemistry but also paves the way for advancements in various scientific domains!

Synonyms
Nitroso-R salt free acid
2007-19-4
2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-nitroso-
DTXSID70173891
DTXCID2096382
NSC677527
3-Hydroxy-4-nitrosonaphthalene-2,7-disulfonic acid
525-05-3
SCHEMBL3215642
1-nitroso-2-naphthol-3,6-disulfonic acid
3-hydroxy-4-nitroso-2,7-naphthalenedisulfonic acid
3-hydroxy-4-nitroso-naphthalene-2,7-disulfonic acid
2,7-Naphthalenedisulfonic acid, 3,4-dihydro-4-hydroxyimino-3-oxo-