Skip to main content

Ponceau 4R

ADVERTISEMENT
Identification
Molecular formula
C20H11N2Na2O7S2
CAS number
2611-82-7
IUPAC name
disodium;8-[4-[4-(4-ethoxyphenyl)azo-3-methyl-phenyl]-2-methyl-phenyl]azo-7-hydroxy-naphthalene-1,3-disulfonate
State
State

At room temperature, Ponceau 4R is in a solid state, typically in the form of a powder or granules.

Melting point (Celsius)
180.00
Melting point (Kelvin)
453.15
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
604.48g/mol
Molar mass
604.4770g/mol
Density
1.4800g/cm3
Appearence

Ponceau 4R appears as a red powder or granules. It is commonly used as a red dye in food products. The shade of red can vary depending on the concentration and pH when dissolved in aqueous solutions.

Comment on solubility

Solubility of Disodium 8-[4-[4-(4-ethoxyphenyl)azo-3-methyl-phenyl]-2-methyl-phenyl]azo-7-hydroxy-naphthalene-1,3-disulfonate

The solubility of disodium 8-[4-[4-(4-ethoxyphenyl)azo-3-methyl-phenyl]-2-methyl-phenyl]azo-7-hydroxy-naphthalene-1,3-disulfonate can be considered based on its chemical structure and functional groups. Here are some key points to consider:

  • Polarity: Due to the presence of multiple sulfonate groups and hydroxyl (-OH) groups, this compound exhibits high polarity. These functional groups are known to interact favorably with polar solvents, particularly water.
  • Water Solubility: The disodium salt form enhances water solubility, making it more readily soluble in aqueous solutions compared to its non-salt counterparts. This solubility can be beneficial in various applications, especially in dye chemistry.
  • Organic Solvents: While the compound shows excellent solubility in water, its solubility in organic solvents may be limited. Typically, compounds with significant polar character struggle to dissolve in non-polar organic solvents.
  • Concentration Effects: At higher concentrations, solubility may be affected by factors such as ionic strength and temperature. The presence of other electrolytes in solution can influence how much of the compound can remain in solution.

In summary, the solubility of disodium 8-[4-[4-(4-ethoxyphenyl)azo-3-methyl-phenyl]-2-methyl-phenyl]azo-7-hydroxy-naphthalene-1,3-disulfonate is largely influenced by its ionic nature and functional groups, leading to impressive solubility characteristics in water while posing challenges in organic media. As a result, it holds potential for practical applications where aqueous solubility is a key factor.

Interesting facts

Interesting Facts about Disodium 8-[4-[4-(4-Ethoxyphenyl)azo-3-methyl-phenyl]-2-methyl-phenyl]azo-7-hydroxy-naphthalene-1,3-disulfonate

Disodium 8-[4-[4-(4-ethoxyphenyl)azo-3-methyl-phenyl]-2-methyl-phenyl]azo-7-hydroxy-naphthalene-1,3-disulfonate, commonly known for its vivid coloration, plays a notable role in both scientific research and various industries. Here are some fascinating insights into this compound:

  • Colorant: This compound is a member of the azo dye family, which is renowned for producing bright and stable colors. Azo compounds are widely used in textiles and food industries, showcasing their versatility.
  • Application in Biology: Due to its unique structural properties, this compound serves as a useful tool in biological research, particularly in studies related to cell membrane interactions and dye-binding assays.
  • Environmental Impact: As with many chemical dyes, its environmental persistence raises questions about ecotoxicity and biodegradability. Ongoing research is focused on finding safer alternatives that minimize ecological footprints.
  • Structural Complexity: The presence of multiple functional groups such as sulfonate and azo functional groups contributes to its solubility and interaction with other chemical species, enhancing its utility in various applications.
  • Safety Considerations: While azo dyes are widely employed, some have been scrutinized due to potential health risks. Regulatory bodies continue to evaluate their safety profiles to ensure they are safe for consumer use.

In conclusion, disodium 8-[4-[4-(4-ethoxyphenyl)azo-3-methyl-phenyl]-2-methyl-phenyl]azo-7-hydroxy-naphthalene-1,3-disulfonate exemplifies the fascinating intersection of chemistry, industry, and environmental science. It's a prime example of how a single compound can impact multiple fields, sparking both innovation and concern in equal measure.

Synonyms
C.I. Direct Red 39
DIRECT RED 39
Erie Scarlet 3B
Calcomine Scarlet 3B
Airedale Scarlet 3BD
CI Direct Red 39
Chloramine Red 3B
Diazol Scarlet 3B
Diphenyl Red 3BS
Benzo Red 3B
Fenamin Scarlet 3B
Kayaku Direct Scarlet 3B
Paper Scarlet 3BP
Paper Scarlet 3BX
Benzyl Scarlet 3BS
Direct Scarlet 3BS
Atlantic Scarlet 3B
Benzanil Scarlet 3B
Mitsui Direct Scarlet 3BX
Phenamine Scarlet 3B
Pontamine Scarlet 3B
Diphenyl Scarlet 3BS
Calcomine Scarlet 3BS
Pheno Fast Scarlet 4B
Union Fast Scarlet 3B
Diaphtamine Fast Scarlet
Amanil Fast Scarlet 3B
Direct Fast Scarlet 3B
C.I. Direct Red 39, disodium salt
Diamine Scarlet 3BA-CF
Triazol Fast Scarlet 3B
Paramine Fast Scarlet 3B
Shikiso Direct Scarlet 3B
Chrome leather Scarlet 3BS
Diaphtamine Fast Scarlet 3B
Benzanol Brilliant Scarlet 3B
CCRIS 4807
HSDB 4230
C.I. 23630
EINECS 228-766-3
NSC 57018
1,3-Naphthalenedisulfonic acid, 8-((4'-((4-ethoxyphenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-7-hydroxy-, disodium salt
DTXSID8025204
NSC-57018
C.I. DIRECT RED 39 [HSDB]
Disodium 8-((4'-((4-ethoxyphenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-7-hydroxynaphthalene-1,3-disulphonate
CI 23630
1,3-Naphthalenedisulfonic acid, 8-(2-(4'-(2-(4-ethoxyphenyl)diazenyl)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)diazenyl)-7-hydroxy-, sodium salt (1:2)
Disodium 8-[[4'-[(4-ethoxyphenyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-7-hydroxynaphthalene-1,3-disulphonate
1,3-Naphthalenedisulfonic acid, 8-[2-[4'-[2-(4-ethoxyphenyl)diazenyl]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]diazenyl]-7-hydroxy-, sodium salt (1:2)
Diamine Scarlet 3BACF
DTXCID401474361
C.I .23630
C.I. Direct Red 39, disodium salt (8CI)
1,3Naphthalenedisulfonic acid, 8((4'((4ethoxyphenyl)azo)3,3'dimethyl(1,1'biphenyl)4yl)azo)7hydroxy, disodium salt
228-766-3
8-((4'-((4-ETHOXYPHENYL)AZO)-3,3'-DIMETHYL(1,1'-BIPHENYL)-4-YL)AZO)-7-HYDROXY-1,3-NAPHTHALENEDISULFONIC ACID DISODIUM SALT
Direct Fast Red 3B
6358-29-8
99D0BZC19R
DIRECTFASTRED3B
UNII-99D0BZC19R
Direct Scarlet 3B
ZOYGJDNPTASPDH-DQQIWZDQSA-L
AKOS024429594
D1472
NS00043278
D89869
Q27077639
DISODIUM 8-((4'-((4-ETHOXYPHENYL)AZO)-3,3'-DIMETHYL(1,1'- BIPHENYL)-4-YL)AZO)-7-HYDROXYNAPHTHALENE-1,3-DISULPHONATE
disodium;8-[[4-[4-[(4-ethoxyphenyl)diazenyl]-3-methylphenyl]-2-methylphenyl]diazenyl]-7-hydroxynaphthalene-1,3-disulfonate