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Acid Orange 7

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Identification
Molecular formula
C16H12N2O5S2
CAS number
633-96-5
IUPAC name
6-hydroxy-5-(2-methoxy-5-methyl-4-sulfo-phenyl)azo-naphthalene-2-sulfonic acid
State
State

At room temperature, Acid Orange 7 is a solid. It is typically encountered in its powder form, which allows for easy dissolution in water or other solvents suitable for use in dyeing processes.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.00
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
350.32g/mol
Molar mass
350.3200g/mol
Density
1.4400g/cm3
Appearence

Acid Orange 7 presents as a reddish-orange powder. It is often used as a dye and therefore appears intensely colored. The compound is stable and retains its color well under normal conditions.

Comment on solubility

Solubility of 6-hydroxy-5-(2-methoxy-5-methyl-4-sulfo-phenyl)azo-naphthalene-2-sulfonic acid

The solubility of 6-hydroxy-5-(2-methoxy-5-methyl-4-sulfo-phenyl)azo-naphthalene-2-sulfonic acid is influenced by several key factors:

  • Polarity: The presence of multiple sulfonic acid (-SO3H) groups increases the overall polarity of the compound, making it more soluble in polar solvents such as water.
  • Temperature: Solubility tends to increase with temperature, enabling better dissolution in warm solvents compared to cold ones.
  • pH levels: The solubility can be highly affected by pH; under acidic conditions, the sulfonic acid groups may remain protonated and promote solubility.

It's essential to note that while the compound may display good solubility in water due to its polar nature, there are scenarios where its solubility can be limited, particularly in non-polar solvents. In general, chemical compounds with sulfonic acid groups demonstrate a trend of increased solubility in water, expanding their potential applications in various fields.

To summarize, the solubility of this compound is largely characterized by:

  1. High solubility in polar solvents.
  2. Increased solubility with rises in temperature.
  3. Significant pH dependence resulting from the functionality of the sulfonic acid groups.

Understanding these factors is crucial for practical applications and further studies involving this compound.

Interesting facts

Interesting Facts about 6-Hydroxy-5-(2-Methoxy-5-Methyl-4-Sulfo-Phenyl)Azo-Naphthalene-2-Sulfonic Acid

6-Hydroxy-5-(2-methoxy-5-methyl-4-sulfo-phenyl)azo-naphthalene-2-sulfonic acid, commonly known in the scientific community as a dye and pigment, is a fascinating compound with a variety of applications and properties that make it noteworthy.

Applications

  • Dyes and Pigments: This compound is primarily used in the textile and printing industries, serving as a vibrant colorant for fabrics and inks.
  • Biochemical Research: Its azo dye nature makes it a valuable tool in biochemical assays, allowing scientists to visualize and track various biological processes.
  • Environmental Studies: It can be employed in studies related to environmental impacts, helping researchers evaluate the toxicity and breakdown of azo dyes in aquatic environments.

Unique Features

This remarkable compound has several unique characteristics that set it apart:

  • Solubility: The sulfonic acid groups enhance its solubility, making it easier to use in aqueous solutions.
  • Colorimetric Properties: The presence of azo linkages in the structure gives rise to vivid colors, which can be quantified using spectrophotometry.
  • Environmental and Health Regulations: Due to the known issues with some azo compounds being potentially carcinogenic, understanding the behavior and breakdown of this compound is crucial in the context of environmental health.

Chemical Insights

As a student or researcher, it’s important to note that:

  • The compound consists of multiple functional groups, including hydroxy, methoxy, and sulfonic acid groups, leading to diverse reactivity and interaction potential.
  • Given its azo structure, it can undergo reduction to form corresponding amines, which is a significant reaction to understand when considering its chemical fate in various environments.
  • Its synthesis often involves diazotization reactions, a fundamental aspect of organic chemistry that showcases the fascinating interplay between different functional groups.

In conclusion, 6-hydroxy-5-(2-methoxy-5-methyl-4-sulfo-phenyl)azo-naphthalene-2-sulfonic acid exemplifies the intricacies of azo dyes, blending color, chemistry, and environmental science into one compelling compound. Its multifaceted applications and properties make it an essential subject of study in both chemistry and industry.

Synonyms
149440-01-7
6-Hydroxy-5-(2-(2-methoxy-5-methyl-4-sulfophenyl)diazenyl)-2-naphthalenesulfonic acid
6-Hydroxy-5-[2-(2-methoxy-5-methyl-4-sulfophenyl)diazenyl]-2-naphthalenesulfonic acid
RefChem:199091
TJP6T3TJP4
UNII-TJP6T3TJP4
Red No. 40
FD and C Red No. 40
FD & C Red no. 40
2-Naphthalenesulfonic acid, 6-hydroxy-5-(2-(2-methoxy-5-methyl-4-sulfophenyl)diazenyl)-
6-Hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonic acid
2-Naphthalenesulfonic acid, 6-hydroxy-5-[2-(2-methoxy-5-methyl-4-sulfophenyl)diazenyl]-
6-Hydroxy-5-[(2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl]naphthalene-2-sulfonic acid
FD&C Red No. 40 parent
SCHEMBL456885
SCHEMBL456886
SCHEMBL5471076
SCHEMBL5471082
CHEMBL1206007
CHEMBL1900089
CHEMBL3306829
DTXSID1044302
SCHEMBL29355233
SCHEMBL29380119
SCHEMBL29410209
SCHEMBL29878763
C.I. 16035
NS00002005
NS00101007
6-Hydroxy-5-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-2-naphthalenesulfonic acid, 9CI