Congo Red | Solubility of Things

Identification

Molecular formula

C₃₂H₂₂N₆Na₂O₆S₂

CAS number

573-58-0

IUPAC name

disodium;3,6-bis[[4-(2,4-diaminophenyl)azophenyl]hydrazono]-4-imino-5-oxo-naphthalene-2,7-disulfonate

State

At room temperature, Congo Red is typically found in a solid state. It is commonly sold and used as a dry powder.

Melting point (Celsius)

360.00

Melting point (Kelvin)

633.15

Boiling point (Celsius)

325.00

Boiling point (Kelvin)

598.15

General information

Molecular weight

696.67g/mol

Molar mass

696.6650g/mol

Density

1.5100g/cm³

Appearence

Congo Red is an organic compound that typically presents as a reddish-brown powder. When dissolved in water, it forms a red colloidal solution which may appear orange-red. It is known for its vivid coloring properties and changes to blue in acidic environments due to its pH-sensitive nature.

Comment on solubility

Solubility of Disodium;3,6-bis[[4-(2,4-diaminophenyl)azophenyl]hydrazono]-4-imino-5-oxo-naphthalene-2,7-disulfonate

The solubility of disodium;3,6-bis[[4-(2,4-diaminophenyl)azophenyl]hydrazono]-4-imino-5-oxo-naphthalene-2,7-disulfonate is influenced by several factors due to its complex molecular structure. Here are some key considerations:

Ionic Structure: As a disodium salt, it is expected to be soluble in polar solvents such as water, as sodium ions can interact favorably with water molecules.
Functional Groups: The presence of multiple sulfonate groups (−SO₃−) contributes to increased hydrophilicity, thereby enhancing solubility in aqueous solutions.
Hydrogen Bonding: The compound’s ability to form hydrogen bonds can affect solubility. This aspect should be considered when predicting solubility behaviors in different solvents.
Temperature:** Generally, solubility can vary with temperature, often increasing in warmer conditions.

In summary, while this compound is likely to exhibit good solubility in water due to its ionic nature and functional groups, experimental values and further assessments of solubility in non-polar or less polar solvents would be essential for comprehensive understanding. As with many chemical compounds, the specific solubility profiles might vary, and thus it is recommended to conduct empirical testing under controlled conditions for precise data.

Interesting facts

Interesting Facts About Disodium 3,6-bis[[4-(2,4-diaminophenyl)azophenyl]hydrazono]-4-imino-5-oxo-naphthalene-2,7-disulfonate

Disodium 3,6-bis[[4-(2,4-diaminophenyl)azophenyl]hydrazono]-4-imino-5-oxo-naphthalene-2,7-disulfonate is a fascinating chemical compound that captures the interest of both chemists and materials scientists alike. Here are some intriguing points about this compound:

Dye Properties: This compound is primarily known for its vivid coloring properties, making it a key substance in the dye industry.

Applications: Its applications extend beyond textiles and can be found in various fields such as:

Biological staining

Photography

Cosmetics

Synthetic Pathway: The synthesis of this compound often involves complex organic reactions, showcasing the intricacies of synthetic organic chemistry.

Photostability: One of the notable features of this disodium salt is its photostability, which makes it suitable for use in products that require prolonged exposure to light without fading.

Research Potential: Ongoing studies are exploring its potential role in:

Biomedical applications such as drug delivery systems

Environmental monitoring techniques

In summary, Disodium 3,6-bis[[4-(2,4-diaminophenyl)azophenyl]hydrazono]-4-imino-5-oxo-naphthalene-2,7-disulfonate is not just a vibrant dye; it represents a blend of chemistry and technology, continuously inspiring research and development in multiple domains. Its multifaceted applications and unique properties make it a compound of significant scientific interest.