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Sudan I

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Identification
Molecular formula
C16H12N2O3S
CAS number
842-07-9
IUPAC name
4-[4-[(2-hydroxy-1-naphthyl)azo]phenyl]azobenzenesulfonic acid
State
State

This compound is typically found in a solid state at room temperature.

Melting point (Celsius)
199.40
Melting point (Kelvin)
472.55
Boiling point (Celsius)
800.00
Boiling point (Kelvin)
1 073.00
General information
Molecular weight
350.36g/mol
Molar mass
350.3600g/mol
Density
1.5000g/cm3
Appearence

Sudan I appears as a reddish-brown crystalline solid. It is often used as a dye and is known for its vibrant coloration properties, primarily in histological staining.

Comment on solubility

Solubility of 4-[4-[(2-hydroxy-1-naphthyl)azo]phenyl]azobenzenesulfonic acid

4-[4-[(2-hydroxy-1-naphthyl)azo]phenyl]azobenzenesulfonic acid, often simply referred to as an azo dye, exhibits distinct solubility characteristics primarily influenced by its molecular structure. Understanding the solubility of this compound is crucial for its applications in various fields, particularly in dye manufacturing and biological studies.

Key Points on Solubility

  • Water Solubility: This compound is generally soluble in water due to the presence of the sulfonic acid group, which enhances ionic interactions, making it more favorable for dissolution.
  • Organic Solvents: It may exhibit variable solubility in organic solvents, often being less soluble in non-polar solvents while more compatible with polar solvents.
  • pH Dependence: The solubility can be affected by pH levels; in acidic or basic environments, the ionization of the sulfonic group can enhance or reduce solubility, respectively.

As a rule, azo dyes, including this compound, are known for their vibrant colors and significant water solubility, which is a prime factor in their widespread utilization. As stated in solubility theory, "like dissolves like," meaning that polar compounds will generally dissolve well in polar solvents, and this principle holds true for 4-[4-[(2-hydroxy-1-naphthyl)azo]phenyl]azobenzenesulfonic acid.

Monitoring and optimizing solubility properties remains pivotal for enhancing performance in scientific applications, especially in fields requiring precise dye behavior and interactions.

Interesting facts

Interesting Facts About 4-[4-[(2-hydroxy-1-naphthyl)azo]phenyl]azobenzenesulfonic acid

4-[4-[(2-hydroxy-1-naphthyl)azo]phenyl]azobenzenesulfonic acid, often referred to within the context of azo compounds, is a fascinating member of the azo dye family. Here are some intriguing aspects of this compound:

  • Azo Compounds: This compound features a characteristic azo group (–N=N–), which is known for its ability to impart vivid colors. Azo dyes are widely used in textiles, food, and art due to their brilliant hues and stability.
  • Applications: The sulfonic acid group in this compound enhances its water solubility, making it an excellent candidate for utilization in various fields, including:
    • Colorants in the textile industry
    • Biological staining agents in microscopy
    • Indicators in analytical chemistry
  • Biological Relevance: Due to its structure, this azo dye can participate in complex interactions within biological systems, often being studied for its potential effects on cellular processes and its role in environmental pollution.
  • Historical Context: Azo dyes have a long history, with their discovery dating back to the 19th century. They were some of the first synthetic dyes produced, revolutionizing the dye industry and providing alternatives to natural dyes.
  • Research Topics: Current scientific investigations surrounding this compound include:
    • Photodegradation and its environmental impact
    • Potential mutagenic and toxic effects in living organisms
    • Innovative applications in drug delivery systems

In summary, 4-[4-[(2-hydroxy-1-naphthyl)azo]phenyl]azobenzenesulfonic acid not only stands out in the world of synthetic dyes due to its striking color properties but also holds significant relevance in both practical applications and ongoing research. Its multifaceted nature makes it a valuable subject of study for chemists and biologists alike.

Synonyms
EINECS 253-621-6
Benzenesulfonic acid, 4-[[4-[(2-hydroxy-1-naphthalenyl)azo]phenyl]azo]-
Benzenesulfonic acid, 4-((4-((2-hydroxy-1-naphthalenyl)azo)phenyl)azo)-
Benzenesulfonic acid, 4-(2-(4-(2-(2-hydroxy-1-naphthalenyl)diazenyl)phenyl)diazenyl)-
4-[2-[4-[2-(2-Hydroxy-1-naphthalenyl)diazenyl]phenyl]diazenyl]benzenesulfonic acid
Benzenesulfonic acid, 4-[2-[4-[2-(2-hydroxy-1-naphthalenyl)diazenyl]phenyl]diazenyl]-
4-(2-(4-(2-(2-Hydroxy-1-naphthalenyl)diazenyl)phenyl)diazenyl)benzenesulfonic acid
37678-79-8
Cloth Scarlet
Merpacyl Red L
Silk Scarlet GL
Benzyl Red G
Silk Red B
Fast Silk Red TR
Red L
Azo Silk Red 3B
Silk Red 3B
Amacid Neutral Red BW
Calcocid Milling Red 3R
C.I. Acid Red 151, monosodium salt
4-[[4-[(2-Hydroxy-1-naphthyl)azo]phenyl]azo]benzenesulfonic acid
Tertracid Milling Scarlet GF
C.I. 26900
NSC-47723
657CH6H6AE
SCHEMBL4412992
CHEMBL1985378
DTXSID8068046
SCHEMBL11336943
AULACELNXWKQIV-SRURNFRUSA-N
LEYJJTBJCFGAQN-UHFFFAOYSA-N
NSC47723
DB-262824
NS00030261
4'-[2-Hydroxynaphthyl-1-azo]azobenzol-4-sulfonic acid
4-((4-((2-Hydroxy-1-naphthyl)azo)phenyl)azo)benzenesulphonic acid
4-[[4-[(2-Hydroxy-1-naphthyl)azo]phenyl ]azo]benzenesulphonic acid
4-[[4-[2-(2-oxonaphthalen-1-ylidene)hydrazinyl]phenyl]diazenyl]benzenesulfonicacid