Skip to main content

Pigment Orange 5

ADVERTISEMENT
Identification
Molecular formula
C18H13N2O4
CAS number
3468-63-1
IUPAC name
1-hydroxy-4-(4-methoxyphenyl)azo-naphthalene-2-carboxylic acid
State
State

Solid at room temperature

Melting point (Celsius)
225.00
Melting point (Kelvin)
498.00
Boiling point (Celsius)
359.00
Boiling point (Kelvin)
632.00
General information
Molecular weight
323.32g/mol
Molar mass
323.3170g/mol
Density
1.5400g/cm3
Appearence

Pigment Orange 5 appears as a red-orange crystalline powder. It is primarily used as a pigment in various applications due to its vibrant coloration and strong tinting strength.

Comment on solubility

Solubility of 1-hydroxy-4-(4-methoxyphenyl)azo-naphthalene-2-carboxylic acid

1-hydroxy-4-(4-methoxyphenyl)azo-naphthalene-2-carboxylic acid, often characterized by its complex molecular structure, exhibits intriguing solubility properties. Here are some key points to consider:

  • Polar Characteristics: The presence of the carboxylic acid group (-COOH) significantly enhances the compound's solubility in polar solvents, such as water, due to hydrogen bonding.
  • Aromatic Structure: The aromatic naphthalene framework can limit solubility in non-polar solvents, as it prefers to interact with similar hydrophobic environments.
  • Organic Solvents: Solubility in organic solvents like ethanol or methanol may be favorable due to the compound’s ability to form dipole-dipole interactions.
  • pH Dependence: The ionization of the carboxylic acid group at varying pH levels can influence solubility. Increased acidity generally enhances solubility.

In summary, the solubility of 1-hydroxy-4-(4-methoxyphenyl)azo-naphthalene-2-carboxylic acid is a balance of its polar and non-polar characteristics, making it soluble in a range of solvents with varying degrees of effectiveness. Understanding these solubility features is crucial for its application in chemical processes and formulations.

Interesting facts

Interesting Facts about 1-Hydroxy-4-(4-Methoxyphenyl)Azo-Naphthalene-2-Carboxylic Acid

1-Hydroxy-4-(4-methoxyphenyl)azo-naphthalene-2-carboxylic acid is a fascinating compound that belongs to a class of organic compounds known as azo compounds. These compounds, characterized by the presence of an azo group (-N=N-), are known for their vibrant colors, which can be attributed to the conjugated π-electron systems they contain. Here are some engaging insights about this compound:

  • Colorants and Dyes: Azo compounds, including this one, are widely utilized in the textile industry as colorants. Their ability to create vivid colors makes them indispensable in dyeing fabrics.
  • Pharmaceutical Potential: Some azo compounds exhibit interesting biological activities, leading researchers to explore their use in drug development. This compound's unique structure might inspire studies looking for new medicinal properties.
  • Synthetic Routes: The synthesis of azo compounds often involves diazotization reactions, which provide rich opportunities for chemists to explore different coupling reactions. This showcases the compound's versatility within synthetic organic chemistry.
  • Environmental Impact: An important aspect of azo dyes, including this compound, is their environmental footprint. Many azo dyes can decompose into potentially harmful substances, leading to strict regulations and a push for more sustainable practices in their production and application.
  • Research Interest: The chemical behavior of this compound, including its adsorption properties and interactions with other molecules, continues to intrigue scientists. Studies delve into its properties and potential applications in other fields, such as materials science.

As a compound emblematic of a rich intersection between color chemistry, synthetic methods, and environmental concerns, 1-hydroxy-4-(4-methoxyphenyl)azo-naphthalene-2-carboxylic acid serves not only as a study subject but also as a window into the broader implications of chemical innovations.

Synonyms
BRN 0928748
23614-84-8
2-NAPHTHOIC ACID, 1-HYDROXY-4-((p-METHOXYPHENYL)AZO)-
1-Hydroxy-4-(p-methoxyphenyldiazeno)-2-naphthoic acid
2-Naphthoic acid, 1-hydroxy-4-(4-methoxyphenylazo)-