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Acid Black 1

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Identification
Molecular formula
C22H14N4O9S3
CAS number
1064-48-8
IUPAC name
5-hydroxy-6-[3-(2-sulfooxyethylsulfonyl)phenyl]azo-naphthalene-1-sulfonic acid
State
State

At room temperature, Acid Black 1 is typically in a solid state in the form of a powder.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.15
Boiling point (Celsius)
350.00
Boiling point (Kelvin)
623.15
General information
Molecular weight
548.58g/mol
Molar mass
548.5800g/mol
Density
1.5512g/cm3
Appearence

Acid Black 1 appears as a dark black powder. When dissolved in water, it forms a black solution. The solid powder may have a slight sheen or sheen due to the crystalline nature of the compound. This compound is commonly used as a dye, and its strong color is evident even in minute quantities.

Comment on solubility

Solubility of 5-hydroxy-6-[3-(2-sulfooxyethylsulfonyl)phenyl]azo-naphthalene-1-sulfonic acid

The compound 5-hydroxy-6-[3-(2-sulfooxyethylsulfonyl)phenyl]azo-naphthalene-1-sulfonic acid is known for its intriguing solubility characteristics. This compound contains multiple functional groups, particularly sulfonic acid groups, which significantly influence its solubility in various solvents.

Key points about its solubility include:

  • High Solubility in Water: Due to the presence of sulfonic acid groups, the compound is expected to exhibit high solubility in aqueous environments. These groups enhance hydrogen bonding and ionic interactions with water molecules.
  • Limited Solubility in Organic Solvents: The presence of polar functional groups generally reduces the solubility of this compound in non-polar organic solvents such as hexane or benzene.
  • pH Dependency: The solubility may also vary with pH changes. At lower pH levels, the sulfonic acid groups can protonate, potentially altering their solubility behavior.

This compound's solubility is a vital feature that affects its applications in various fields, including dye chemistry, biochemical assays, and as a reagent in analytical chemistry. Understanding its solubility properties allows chemists to leverage its potential in different chemical environments effectively.

Interesting facts

Interesting Facts about 5-hydroxy-6-[3-(2-sulfooxyethylsulfonyl)phenyl]azo-naphthalene-1-sulfonic acid

This compound, commonly known in various scientific domains, is a fascinating member of the azo dye family, which are characterized by their azo (-N=N-) functional groups. These dyes are well-known not just for their vibrant colors, but also for their versatility in various applications. Here are some interesting aspects of this compound:

  • Azo Dye Properties: As an azo compound, its vibrant coloration arises from the conjugated system provided by the azo group. This allows for a wide range of colors based on its structure and substituents, which can be tuned for specific uses.
  • Applications: Primarily, compounds like this one are used extensively in the textile industry for dyeing fabrics. They can also be found in food coloring, cosmetics, and biological staining.
  • Functional Groups: The presence of sulfonic acid and sulfonate groups enhances the compound’s solubility in water, making it suitable for dyeing applications that require aqueous solutions.
  • Environmental Concerns: While azo dyes are widely used, some are known to produce potentially harmful amines upon degradation. Hence, there’s ongoing research into the environmental impact and degradation processes of such compounds.
  • Analytical Chemistry: This compound can serve as a model for developing methods in analytical chemistry, specifically in the study of dye behavior and stability under various conditions.

Notably, a quote that encapsulates the essence of azo dyes is, “Color is the keyboard, the eyes are the harmonies, the soul is the piano with many strings.” This illustrates the intimate connection between chemistry and aesthetics that compounds like 5-hydroxy-6-[3-(2-sulfooxyethylsulfonyl)phenyl]azo-naphthalene-1-sulfonic acid bring to various fields.

As you continue your journey in chemical science, remember that each compound has a story—its structure, properties, and impact on industries and environment all play a part in the broader narrative of chemistry.

Synonyms
DTXSID30864894
5-Hydroxy-6-({3-[2-(sulfooxy)ethanesulfonyl]phenyl}diazenyl)naphthalene-1-sulfonic acid