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Orange G

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Identification
Molecular formula
C16H10N2O7S2Na2
CAS number
1936-15-8
IUPAC name
2-[(2-hydroxy-1-naphthyl)azo]-5-(4-sulfophenyl)azo-benzenesulfonic acid
State
State

Orange G is usually in a solid state at room temperature and is available as a powder. It is stable under normal conditions but should be kept dry to prevent degradation.

Melting point (Celsius)
270.00
Melting point (Kelvin)
543.15
Boiling point (Celsius)
575.00
Boiling point (Kelvin)
848.15
General information
Molecular weight
452.37g/mol
Molar mass
452.3720g/mol
Density
1.6205g/cm3
Appearence

Orange G is an orange or reddish-brown powder that is soluble in water, forming a clear solution. It is a synthetic azo dye primarily used in the production of biological stains.

Comment on solubility

Solubility of 2-[(2-hydroxy-1-naphthyl)azo]-5-(4-sulfophenyl)azo-benzenesulfonic acid

The solubility of 2-[(2-hydroxy-1-naphthyl)azo]-5-(4-sulfophenyl)azo-benzenesulfonic acid is influenced by several factors, making it an interesting subject of study. This compound belongs to a class of azo compounds known for their vibrant colors and complex molecular structures.

Key Points on Solubility:

  • Solvent Compatibility: This compound is typically soluble in polar solvents such as water, which can stabilize its ionic nature, thanks to the presence of the sulfonic acid group. However, it has limited solubility in non-polar solvents.
  • pH Sensitivity: The solubility can vary with changes in pH levels. Alkaline conditions often enhance solubility due to deprotonation of acidic groups.
  • Temperature Influence: Generally, increasing temperature tends to increase the solubility of many compounds. This compound may follow that trend as well, although specific empirical data would be required to confirm this behavior.
  • Concentration Effects: At higher concentrations, the solubility may exhibit saturation limits, leading to precipitation, especially in aqueous solutions.

In terms of its applications, the solubility properties directly relate to its effectiveness in various industries, including dyes and pH indicators. As quoted, "Solubility is not merely a physical property; it revolutionizes how we utilize compounds across diverse fields." Thus, understanding these solubility characteristics is crucial for the effective use of 2-[(2-hydroxy-1-naphthyl)azo]-5-(4-sulfophenyl)azo-benzenesulfonic acid.

Interesting facts

Exploring the Fascinating World of 2-[(2-hydroxy-1-naphthyl)azo]-5-(4-sulfophenyl)azo-benzenesulfonic acid

This intriguing compound, often referred to in the context of azo dyes, plays a significant role in both laboratory settings and industrial applications. Here are some compelling facts about this chemical compound:

  • Azo Dyes: Compounds of this class are characterized by the unique azo functional group (–N=N–), which is responsible for their vivid coloring.
  • Applications: This compound is commonly utilized in textile dyeing, inks, and food coloring, showcasing the versatility of azo dyes across various industries.
  • Structural Features: The combination of the naphthalene moiety and sulfonic acid groups significantly enhances the solubility of the dye in water, making it particularly useful for aqueous applications.
  • Environmental Considerations: Due to concerns about the potential toxicity of azo dyes, research is ongoing to evaluate their impact on health and the environment. This emphasizes the importance of responsible use and management.
  • Color Properties: The compound is known for its bright and stable colors, which are essential for maintaining the aesthetic quality of products that utilize these dyes.
  • Chemical Reactions: The presence of hydroxyl and sulfophenyl groups allows for a range of chemical reactions, making it a useful building block for synthesizing other azocompounds and dye intermediates.

In conclusion, 2-[(2-hydroxy-1-naphthyl)azo]-5-(4-sulfophenyl)azo-benzenesulfonic acid stands out not only for its vibrant hues and impressive structural characteristics but also for its significant implications in both industrial applications and health and environmental safety. As research continues to unfold, our understanding of this compound and its derivatives will pave the way for innovations in chemistry and materials science.

Synonyms
Biebrich scarlet (acid form)
2-[(2-hydroxynaphthalen-1-yl)diazenyl]-5-[(4-sulfophenyl)diazenyl]benzene-1-sulfonic acid
acid red 66 (free acid form)
CHEMBL1995265
SCHEMBL11877643
SCHEMBL26666880
CHEBI:87187
DTXSID40863338
VJULFVPZZZJPDJ-SRURNFRUSA-N
NSC79710
NSC-79710
Q27159431