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Orange G

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Identification
Molecular formula
C16H10N2Na2O7S2
CAS number
1936-15-8
IUPAC name
3-hydroxy-4-(4-methyl-2-sulfo-phenyl)azo-naphthalene-2-carboxylic acid
State
State

Orange G is typically a solid at room temperature.

Melting point (Celsius)
220.00
Melting point (Kelvin)
493.00
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
452.37g/mol
Molar mass
452.3730g/mol
Density
1.5200g/cm3
Appearence

Orange G is a bright orange powder. It is a synthetic azo dye, known for its intense color.

Comment on solubility

Solubility of 3-hydroxy-4-(4-methyl-2-sulfo-phenyl)azo-naphthalene-2-carboxylic acid

When examining the solubility of the compound 3-hydroxy-4-(4-methyl-2-sulfo-phenyl)azo-naphthalene-2-carboxylic acid, it is essential to consider its structural characteristics. This compound boasts both hydrophilic and hydrophobic functional groups, which significantly influence its solubility in various solvents.

Factors Affecting Solubility

  • Polar Groups: The presence of the sulfonic acid group (-SO3H) enhances solubility in water, making it more likely to dissolve in polar solvents.
  • Hydrophobic Regions: The naphthalene structure and the aromatic groups contribute to hydrophobic interactions, which could reduce solubility in polar environments.

Thus, the solubility of this compound can be summarized as follows:

  • High solubility in water due to its ionic sulfonic acid group.
  • Potentially lower solubility in non-polar solvents due to the hydrophobic naphthalene structure.

In conclusion, while 3-hydroxy-4-(4-methyl-2-sulfo-phenyl)azo-naphthalene-2-carboxylic acid is expected to exhibit good solubility in aqueous solutions, its behavior in various organic solvents may vary considerably. As defined, "Solubility is a balance between the attraction of molecules in the solute and the solvent; a key factor in determining the behavior of chemical compounds."

Interesting facts

Interesting Facts about 3-Hydroxy-4-(4-Methyl-2-sulfo-phenyl)azo-naphthalene-2-carboxylic Acid

This fascinating compound, known for its complex structure and vibrant color, plays a significant role in various applications, especially in the dye industry. Here are some intriguing aspects:

  • Dye Properties: The compound belongs to the azo dye family, which are characterized by the presence of a functional group known as the azo group (-N=N-). Azo dyes are renowned for their bright colors and excellent lightfastness.
  • Biological Significance: Certain azo compounds are known for their potential as *colorimetric indicators*, meaning they can change color in response to different pH levels, making them useful in biochemical applications.
  • Environmental Impact: As with many azo dyes, there are concerns regarding the degradation products that can arise during their breakdown, leading to toxicity. However, this compound’s sulfonic group enhances its water solubility, which can be advantageous for certain applications.
  • Industrial Uses: It is often utilized in textile dyeing, as well as in printing inks and plastics, showcasing its versatility across various industries.
  • Research Applications: The compound is of interest in ongoing research, particularly in the fields of organic chemistry and materials science, for the development of new dyeing techniques and materials.

In summary, the structure and characteristics of 3-hydroxy-4-(4-methyl-2-sulfo-phenyl)azo-naphthalene-2-carboxylic acid not only highlight its utility in dye manufacturing but also raise *important environmental considerations*. As scientists continue to explore the properties of such compounds, they pave the way for more sustainable practices in dye usage and development.

Synonyms
Litholrubine BK
3-hydroxy-4-[(4-methyl-2-sulphophenyl)azo]-2-naphthoic acid
3-Hydroxy-4-((4-methyl-2-sulphophenyl)azo)-2-naphthoic acid
3-Hydroxy-4-[2-(4-methyl-2-sulfophenyl)diazenyl]-2-naphthalenecarboxylic acid
3-Hydroxy-4-(2-(4-methyl-2-sulfophenyl)diazenyl)-2-naphthalenecarboxylic acid
CI Pigment Red 57RubinpigmentCarmine 6B
240-152-7
16014-23-6
2-Naphthalenecarboxylic acid, 3-hydroxy-4-((4-methyl-2-sulfophenyl)azo)-
2-Naphthalenecarboxylic acid, 3-hydroxy-4-[(4-methyl-2-sulfophenyl)azo]-
3-hydroxy-4-[(4-methyl-2-sulfophenyl)diazenyl]naphthalene-2-carboxylic acid
EINECS 240-152-7
SCHEMBL92057
CHEMBL2008134
DTXSID4065995
SCHEMBL10087038
SCHEMBL13276169
SCHEMBL13276170
JYNBEDVXQNFTOX-UHFFFAOYSA-N
3-Hydroxy-4-[(4-methyl-2-sulfophenyl)azo]-2-naphthoic acid
2-Naphthalenecarboxylic acid, 3-hydroxy-4-(2-(4-methyl-2-sulfophenyl)diazenyl)-
E180
NCI60_004889
NS00087442
3-hydroxy-4-[(4-methyl-2-sulfophenyl)diazenyl]-2-naphthoic acid
3-Hydroxy-4-[(4-methyl-2-sulfophenyl)azo]-2-naphthalenecarboxylic acid, 9CI