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Orange G

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Identification
Molecular formula
C16H10ClN3O4S
CAS number
1936-15-8
IUPAC name
5-chloro-2-[(2-hydroxy-1-naphthyl)azo]-4-methyl-benzenesulfonic acid
State
State

At room temperature, Orange G is a solid. It typically comes in powder form for ease of use in various applications, particularly in a laboratory or industrial setting.

Melting point (Celsius)
189.00
Melting point (Kelvin)
462.00
Boiling point (Celsius)
300.00
Boiling point (Kelvin)
573.00
General information
Molecular weight
452.88g/mol
Molar mass
452.3750g/mol
Density
1.7050g/cm3
Appearence

Orange G appears as an orange to red powder. It is commonly used as a dye and is known for its strong orange color. In solution or when used in textiles, it imparts a bright orange hue.

Comment on solubility

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

The solubility of 5-chloro-2-[(2-hydroxy-1-naphthyl)azo]-4-methyl-benzenesulfonic acid can be influenced by its complex structure and functional groups. This compound contains several components that affect its solubility profile:

  • Functional Groups: The presence of the sulfonic acid group (-SO3H) generally increases solubility in water due to its ability to ionize and form hydrogen bonds with water molecules.
  • Aromatic Rings: The naphthyl and chloro substitution can lead to varying degrees of hydrophobic character, thus impacting solubility.
  • Hydroxyl Group: The hydroxyl group (-OH) enhances solubility due to its polar nature.

Overall, while the sulfonic acid group promotes aqueous solubility, the extent of it can be offset by the hydrophobic characteristics imparted by the hydrocarbon portions of the molecule. As a result:

  1. Aqueous solubility is generally expected to be moderate.
  2. This compound may dissolve well in polar organic solvents.

Understanding these factors is crucial for applications involving this compound, as its solubility can significantly affect its reactivity and utility in various chemical processes.

Interesting facts

Interesting Facts about 5-Chloro-2-[(2-Hydroxy-1-naphthyl)azo]-4-methyl-benzenesulfonic acid

This compound, commonly referred to in the field of chemistry, showcases intriguing properties and applications that make it an interesting subject of study:

  • Color Chemistry: The presence of the azo group (–N=N–) in its structure is responsible for vibrant colors. Azo compounds are widely used as dyes, providing a rich palette for textiles and art.
  • pH Indicator: Due to the sulfonic acid group, this compound may act as a pH indicator in various chemical analyses, changing color as the pH of the solution varies.
  • Versatile Applications: Beyond dyes, derivatives of this compound can be utilized in pharmaceuticals, agrochemicals, and even in the synthesis of pigments.
  • Research Relevance: Scientists are keen on studying this compound for its potential biological activities, including antibacterial and antitumor properties.
  • Environmental Impact: With growing concerns regarding synthetic dyes and their environmental footprint, this compound represents an area of research focused on developing safer, more sustainable alternatives.

The study of compounds like 5-chloro-2-[(2-hydroxy-1-naphthyl)azo]-4-methyl-benzenesulfonic acid not only enhances our understanding of chemical interactions but also opens up discussions on sustainability and innovation in chemistry. As researchers continue to explore the full potential of this compound, it contributes to the exciting narrative of chemical science in addressing real-world applications.

Synonyms
15958-19-7
2-chloro-5-[(2-hydroxy-1-naphthyl)azo]toluene-4-sulphonic acid
V5JEX3KGDA
Lake Red C
Red Lake C
5-chloro-2-[(2-hydroxynaphthalen-1-yl)diazenyl]-4-methylbenzenesulfonic acid
UNII-V5JEX3KGDA
D.C. Red No. 9
2-Chloro-5-((2-hydroxy-1-naphthyl)azo)toluene-4-sulphonic acid
EINECS 240-089-5
D&C Red No. 9 parent
SCHEMBL92064
DTXSID7047227
DTXSID30859902
IYHIFXGFKVJNBB-UHFFFAOYSA-N
NS00086344
Q27291560
5-chloro-2-((2-hydroxy-1-naphthalenyl)azo)-4-methylbenzenesulfonic acid
5-Chloro-2-[(2-hydroxynaphthalen-1-yl)diazenyl]-4-methylbenzene-1-sulfonic acid
BENZENESULFONIC ACID, 5-CHLORO-2-(2-(2-HYDROXY-1-NAPHTHALENYL)DIAZENYL)-4-METHYL-