Skip to main content

Pigment Orange 5

ADVERTISEMENT
Identification
Molecular formula
C13H9N3O5
CAS number
3468-63-1
IUPAC name
2-hydroxy-5-(3-nitrophenyl)azo-benzoic acid
State
State

At room temperature, Pigment Orange 5 is in a solid state, typically found as a powder.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.15
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
314.22g/mol
Molar mass
314.2610g/mol
Density
1.4400g/cm3
Appearence

Pigment Orange 5 typically appears as an orange to reddish-brown powder. It is often used as a dye or pigment in various applications due to its vibrant coloration properties.

Comment on solubility

Solubility of 2-hydroxy-5-(3-nitrophenyl)azo-benzoic acid

2-hydroxy-5-(3-nitrophenyl)azo-benzoic acid, often referred to as an azo compound, exhibits interesting solubility characteristics that are crucial for its applications in various fields. The solubility of this compound can be influenced by several factors, including:

  • Polarity: Azo compounds like this tend to be polar due to the presence of hydroxyl (-OH) and nitro (-NO2) groups, which can lead to increased solubility in polar solvents.
  • pH Levels: The ionization of the carboxylic acid group can significantly affect solubility. In acidic environments, the compound may remain un-ionized, while in alkaline conditions, it can become ionized, enhancing its solubility.
  • Temperature: Higher temperatures typically increase solubility in most solvents, allowing for better dissolution of the compound.
  • Solvent Choice: While the compound is likely to be soluble in various organic solvents such as ethanol and methanol, its solubility in water can be limited due to hydrophobic interactions.

In summary, as 2-hydroxy-5-(3-nitrophenyl)azo-benzoic acid is evaluated for solubility, it is essential to consider its molecular structure, the solvent environment, and conditions like temperature and pH. Understanding these factors can lead to a more effective use of this compound in relevant applications such as dyes, pigments, and biological studies.

Interesting facts

Interesting Facts About 2-Hydroxy-5-(3-Nitrophenyl)Azo-Benzoic Acid

2-Hydroxy-5-(3-nitrophenyl)azo-benzoic acid, commonly known as a dye and an analytical reagent, offers fascinating insights into the world of synthetic organic compounds. Here are some notable aspects of this compound:

  • Azo Compounds: This compound belongs to the class of azo compounds, which are characterized by the presence of the -N=N- (azo) functional group. Azo dyes are known for their vibrant colors and are widely used in the textile industry.
  • Applications in Chemistry: 2-hydroxy-5-(3-nitrophenyl)azo-benzoic acid is often employed as a pH indicator and in titrations, making it an essential tool in many laboratory settings. Its ability to change color over a specific pH range facilitates its use in acid-base chemistry.
  • Impact of Azo Group: The presence of the nitrophenyl group in this compound enhances the electronic properties of the azo linkage, influencing its light absorption and color characteristics. This feature is particularly useful when analyzing its behavior in various environments.
  • Toxicity Concerns: While azo compounds can be incredibly useful, some can pose health risks. Certain azo dyes have been scrutinized for their potential to release harmful amines, which necessitates careful consideration of their usage and disposal.
  • Cultural Significance: Azo dyes have made significant contributions to both fashion and art throughout history, allowing for a wide range of decorative applications. The color spectrum provided by these dyes continues to inspire artists and designers today.

Overall, 2-hydroxy-5-(3-nitrophenyl)azo-benzoic acid serves as a remarkable illustration of how chemical compounds can bridge art and science, leading to both practical applications in laboratories and beautiful aesthetics in the world around us.

Synonyms
6283-26-7
C.I. Mordant Yellow 1 (free acid)
Metachrome Yellow free acid
2-Hydroxy-5-((3-(hydroxy(oxido)amino)phenyl)diazenyl)benzoic acid
WM785CYD3S
CHEMBL3134406
NSC7797
NSC-7797
Benzoic acid, 2-hydroxy-5-(2-(3-nitrophenyl)diazenyl)-
Benzoic acid, 2-hydroxy-5-[2-(3-nitrophenyl)diazenyl]-
NSC 7797
UNII-WM785CYD3S
SCHEMBL4047509
DTXSID70862238
LJOXBIGRIKPBSQ-CCEZHUSRSA-N
BDBM50496604
5-[(m-nitrophenyl)azo]salicylic acid
AKOS000282977
3-Nitrobenzene-1-azo-5-salicylic acid
Salicylic acid, 5-(m-nitrophenylazo)-
C.I. MORDANT YELLOW 1 FREE ACID
benzoic acid, 2-hydroxy-5-(3-nitrophenylazo)-
2-hydroxy-5-[(E)-(3-nitrophenyl)azo]benzoic acid
2-hydroxy-5-[(E)-(3-nitrophenyl)diazenyl]benzoic acid
2-Hydroxy-5-((1E)-2-(3-nitrophenyl)diazenyl)benzoic acid
Benzoic acid, 2-hydroxy-5-((1E)-2-(3-nitrophenyl)diazenyl)-