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Acid Orange 7

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Identification
Molecular formula
C16H11N2NaO4S
CAS number
633-96-5
IUPAC name
7-amino-4-hydroxy-3-[4-[4-[(1-hydroxy-4-sulfo-2-naphthyl)azo]-3-methoxy-phenyl]-2-methoxy-phenyl]azo-naphthalene-2-sulfonic acid
State
State
At room temperature, this compound is a solid. It is typically supplied in powder form, which is a reddish-orange color, indicative of its use as a dye.
Melting point (Celsius)
300.00
Melting point (Kelvin)
573.00
Boiling point (Celsius)
584.50
Boiling point (Kelvin)
857.50
General information
Molecular weight
350.32g/mol
Molar mass
350.3200g/mol
Density
1.3800g/cm3
Appearence

Acid Orange 7 appears as a reddish-orange powder. It is commonly utilized as a dye in various industries, including textiles and food. The solid form is characterized by its vibrant orange hue, which is visible when the powder is handled or dispensed.

Comment on solubility

Solubility of 7-amino-4-hydroxy-3-[4-[4-[(1-hydroxy-4-sulfo-2-naphthyl)azo]-3-methoxy-phenyl]-2-methoxy-phenyl]azo-naphthalene-2-sulfonic acid

The compound 7-amino-4-hydroxy-3-[4-[4-[(1-hydroxy-4-sulfo-2-naphthyl)azo]-3-methoxy-phenyl]-2-methoxy-phenyl]azo-naphthalene-2-sulfonic acid exhibits notable solubility characteristics which are primarily influenced by its complex structure containing multiple functional groups.

Key aspects of its solubility include:

  • Water Solubility: The presence of sulfonic acid groups (–SO3H) significantly enhances water solubility, as these groups are highly polar and can interact favorably with water molecules.
  • Solvent Interactions: The compound can demonstrate varying solubility in organic solvents due to its hydrophobic aromatic rings and methoxy (-OCH3) groups that provide lipophilic characteristics.
  • Temperature Dependency: Solubility typically increases with temperature, as higher thermal energy can disrupt intermolecular attractions and facilitate solute-solvent interactions.

In summary, the solubility of this compound reflects a balance between its hydrophilic and hydrophobic nature, making it more soluble in polar solvents like water while potentially less soluble in non-polar organic solvents. This unique balance in solubility properties makes it a candidate for various applications, particularly in dye chemistry and related fields.

Interesting facts

Exploring 7-amino-4-hydroxy-3-[4-[4-[(1-hydroxy-4-sulfo-2-naphthyl)azo]-3-methoxy-phenyl]-2-methoxy-phenyl]azo-naphthalene-2-sulfonic acid

This compound is a fascinating member of the azo dye family, which is renowned for their vibrant colors and extensive applications. Let's delve into some intriguing aspects:

  • Azo Dyes: The presence of azo groups (–N=N–) is a hallmark of this class, offering a wide range of hues from yellows to vibrant reds, which is primarily due to the electronic transition of their π bonds.
  • Application in Textiles: A compound like this one is often used in textile dyeing, providing excellent colorfastness and brightness. The sulfonic acid groups enhance its solubility and affinity for fabrics.
  • Biological Activity: Beyond its use as a dye, this compound may possess various biological functions, being explored for potential uses in pharmaceuticals and biological staining techniques.
  • Environmental Considerations: The environmental impact of azo dyes is a topic of ongoing research. Some azo dyes may undergo reduction to form aromatic amines, which can be harmful, thus necessitating careful management of wastewater containing such dyes.
  • Complex Structure: The intricate structure of this molecule, with multiple phenyl and naphthyl rings, contributes to its stability and unique properties, making it a subject of interest in synthetic organic chemistry.

As a chemistry student, studying compounds like 7-amino-4-hydroxy-3-[4-[4-[(1-hydroxy-4-sulfo-2-naphthyl)azo]-3-methoxy-phenyl]-2-methoxy-phenyl]azo-naphthalene-2-sulfonic acid can deepen your understanding of molecular interactions and the vast potential of chemical compounds in real-world applications. The blend of aesthetics and functionality in azo dyes reflects the incredible diversity found in chemical science.

Synonyms
CHEMBL1269664
NSC-47754
25255-05-4
DTXSID50863844
BDBM50328834
3-((4''-((6-amino-1-hydroxy-3-sulfonaphthalen-2-yl)diazenyl)-3,3''-dimethoxybiphenyl-4-yl)diazenyl)-4-hydroxynaphthalene-1-sulfonic acid
3-[2-[4'-[2-(6-Amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]diazenyl]-4-hydroxy-1-naphthalenesulfonic acid
7-Amino-4-hydroxy-3-[[4-[4-[(1-hydroxy-4-sulfonaphthalen-2-yl)diazenyl]-3-methoxyphenyl]-2-methoxyphenyl]diazenyl]naphthalene-2-sulfonic acid