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Brilliant Black PN

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Identification
Molecular formula
C20H12Cl2N6O7S2
CAS number
2519-30-4
IUPAC name
2,5-dichloro-4-[3-methyl-5-oxo-4-(4-sulfophenyl)azo-4H-pyrazol-1-yl]benzenesulfonic acid
State
State

Brilliant Black PN is typically found as a solid at room temperature. It can form a dusty powder and is often supplied in granular form for ease of handling and solubility. When exposed to air, it may absorb moisture due to its hygroscopic nature.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.15
Boiling point (Celsius)
337.00
Boiling point (Kelvin)
610.15
General information
Molecular weight
867.94g/mol
Molar mass
867.9410g/mol
Density
1.2200g/cm3
Appearence

Brilliant Black PN is a synthetic black dye. It usually appears as a black solid or as a fine powder. The dye is highly soluble in water, forming a dark black solution.

Comment on solubility

Solubility of 2,5-Dichloro-4-[3-methyl-5-oxo-4-(4-sulfophenyl)azo-4H-pyrazol-1-yl]benzenesulfonic Acid

The solubility of compounds like 2,5-dichloro-4-[3-methyl-5-oxo-4-(4-sulfophenyl)azo-4H-pyrazol-1-yl]benzenesulfonic acid can be influenced by several factors, leading to some noteworthy observations:

  • Polar Nature: Due to the presence of the sulfonic acid group, which is highly polar, this compound exhibits a tendency to dissolve in polar solvents such as water.
  • pH Dependency: The solubility may vary with pH; at lower pH levels (more acidic), this compound can exist in a protonated form, potentially increasing its solubility.
  • Intermolecular Forces: The structure contains various functional groups that can engage in hydrogen bonding and dipole-dipole interactions, enhancing its solubility in aqueous solutions.
  • Aromatic Characteristics: The presence of aromatic rings may lead to decreased solubility compared to aliphatic compounds; however, the sulfonic acid group significantly mitigates this effect.
  • Solubility in Organic Solvents: While polar solvents are ideal, the compound may display limited solubility in non-polar organic solvents due to its structural composition.

In summary, the solubility profile of 2,5-dichloro-4-[3-methyl-5-oxo-4-(4-sulfophenyl)azo-4H-pyrazol-1-yl]benzenesulfonic acid illustrates a complex interaction of its functional groups with the solvent environment, showing a stronger affinity for polar media.

Interesting facts

Interesting Facts about 2,5-Dichloro-4-[3-methyl-5-oxo-4-(4-sulfophenyl)azo-4H-pyrazol-1-yl]benzenesulfonic Acid

This compound, with its complex structure, plays a significant role in various applications, particularly in the field of dyes and pigments. Here are some intriguing facts about this aromatic compound:

  • Dye Chemistry: This compound belongs to a class of azo dyes, known for their vibrant colors. The azo functional group (-N=N-) is responsible for the intense hues seen in many products such as textiles, inks, and food colorants.
  • Uses in Industry: Apart from being a dye, it can also act as a colorant in synthetic materials and is often explored for applications in plastics and coatings to enhance aesthetics.
  • Health Considerations: Like many dyes, the safety of 2,5-dichloro-4-[3-methyl-5-oxo-4-(4-sulfophenyl)azo-4H-pyrazol-1-yl]benzenesulfonic acid has been a topic of research due to potential health risks. Regulatory bodies monitor its use to ensure safety in consumer products.
  • Synthetic Pathways: The synthesis of this compound can involve intricate organic reactions, showcasing the creativity and skill required in modern synthetic chemistry. Chemists often rely on various reaction mechanisms to develop such complex structures.
  • Environmental Impact: The environmental implications of azo dyes, including this compound, are a significant concern. Studies focus on their biodegradability and the potential for accumulation in aquatic environments, sparking ongoing research into greener alternatives.

This compound exemplifies the intersection of chemistry, artistry, and environmental science, underscoring the need for innovators to create safe, effective, and sustainable materials.

Synonyms
25739-65-5
2,5-Dichloro-4-(4,5-dihydro-3-methyl-5-oxo-4-(2-(4-sulfophenyl)diazenyl)-1H-pyrazol-1-yl)benzenesulfonic acid
2,5-Dichloro-4-[4,5-dihydro-3-methyl-5-oxo-4-[2-(4-sulfophenyl)diazenyl]-1H-pyrazol-1-yl]benzenesulfonic acid
Yellow 2G
2,5-dichloro-4-[3-methyl-5-oxo-4-[(4-sulfophenyl)diazenyl]-4H-pyrazol-1-yl]benzenesulfonic acid
Acid Leather Yellow 2GL
Benzenesulfonic acid, 2,5-dichloro-4-(4,5-dihydro-3-methyl-5-oxo-4-((4-sulfophenyl)azo)-1H-pyrazol-1-yl)-
Benzenesulfonic acid, 2,5-dichloro-4-[4,5-dihydro-3-methyl-5-oxo-4-[(4-sulfophenyl)azo]-1H-pyrazol-1-yl]-
NSC324981
NSC-324981
UNII-9IEP9ULI22
C.I. 18965
SCHEMBL9112323
DTXSID0048000
SCHEMBL23064842
DWYWPBYWDAZKNX-UHFFFAOYSA-N
2,5-dichloro-4-[3-methyl-5-oxo-4-[(E)-(4-sulfophenyl)azo]-4H-pyrazol-1-yl]benzenesulfonic acid
Benzenesulfonic acid, 2,5-dichloro-4-[4,5-dihydro-3-methyl-5-oxo-4-[(E)-(4-sulfophenyl)azo]-1H-pyrazol-1-yl]-