Skip to main content

Direct Red 81

ADVERTISEMENT
Identification
Molecular formula
C34H26N6Na2O8S4
CAS number
2610-11-9
IUPAC name
disodium;3-amino-4-[4-[4-[4-(p-tolylsulfonyloxy)phenyl]azophenyl]phenyl]azo-naphthalene-2,7-disulfonate
State
State

At room temperature, Direct Red 81 exists as a solid. It is typically processed and used in its powdered form.

Melting point (Celsius)
300.00
Melting point (Kelvin)
573.15
Boiling point (Celsius)
710.00
Boiling point (Kelvin)
983.15
General information
Molecular weight
760.77g/mol
Molar mass
760.7700g/mol
Density
1.4000g/cm3
Appearence

Direct Red 81 is commonly seen as a red to dark red powder. It is known for its vibrant color and is used as a dye. The compound may appear brighter under different lighting conditions.

Comment on solubility

Solubility of Disodium 3-amino-4-[4-[4-[4-(p-tolylsulfonyloxy)phenyl]azophenyl]phenyl]azo-naphthalene-2,7-disulfonate

The solubility of disodium 3-amino-4-[4-[4-[4-(p-tolylsulfonyloxy)phenyl]azophenyl]phenyl]azo-naphthalene-2,7-disulfonate is influenced by several factors due to its complex structure. This compound can be characterized as having:

  • High Water Solubility: As a disodium salt, it is likely to be more soluble in water compared to its parent acid form, due to the ionic nature of disodium salts.
  • Presence of Sulfonate Groups: The sulfonate (-SO3-) groups enhance hydrophilicity, contributing positively to solubility in polar solvents.
  • Effects of Substituents: The presence of the p-tolylsulfonyloxy and azo groups also plays a role, as hydrophobic substituents may decrease overall solubility in non-polar solvents.

In aqueous solutions, the solubility can be markedly improved, leading to effective dispersal in various mediums, which is critical for applications in dyeing and biochemical assays. It is notable that:

  • The compound demonstrates varying solubility levels depending on temperature and pH of the solution.
  • Solubility can also be influenced by the presence of other ions or molecules in the solution, which may compete for solvation.

Overall, while the specific values of solubility may require empirical determination, the structural characteristics strongly suggest that this compound is quite soluble in water, making it useful in many commercial and laboratory applications. As with many chemical substances, the precise solubility can be a vital factor in its practical use, highlighting the importance of understanding the solubility profiles of chemical compounds.

Interesting facts

Interesting Facts about Disodium 3-Amino-4-[4-[4-[4-(p-tolylsulfonyloxy)phenyl]azophenyl]phenyl]azo-naphthalene-2,7-disulfonate

This compound is a complex azo dye, commonly used in various applications due to its vivid coloring properties. Here are some intriguing details:

  • Azo Dyes: Azo compounds, like this one, are characterized by the -N=N- functional group, which plays a crucial role in the color properties of the dye.
  • Applications: This dye is primarily used in the textile industry, particularly for coloring fabrics. Additionally, it finds applications in the formulation of inks and plastics.
  • Toxicity Considerations: While azo dyes can offer brilliant colors, some azo compounds are known to break down into potentially harmful amines. Therefore, its use is often monitored and regulated in various jurisdictions.
  • Color Varieties: Depending on pH and other environmental factors, azo dyes can exhibit different hues, making them versatile for various design applications. This compound's structural components allow for a wide range of color blends.
  • Research Interest: Scientists are continually researching the properties of azo dyes like disodium 3-amino-4-[4-[4-[4-(p-tolylsulfonyloxy)phenyl]azophenyl]phenyl]azo-naphthalene-2,7-disulfonate to find safer alternatives and more sustainable production methods.

In conclusion, while disodium 3-amino-4-[4-[4-[4-(p-tolylsulfonyloxy)phenyl]azophenyl]phenyl]azo-naphthalene-2,7-disulfonate may seem like a complex name, it represents a significant area of study within chemical dyes, reflecting both industrial utility and important considerations in safety and environmental impact.

Synonyms
Acid Orange 45
2429-80-3
C.I. Acid Orange 45
Polar Orange R
Bucacid Orange R
Fenafor Orange R
Milling Orange R
Benzyl Orange 2R
disodium;3-amino-4-[[4-[4-[[4-(4-methylphenyl)sulfonyloxyphenyl]diazenyl]phenyl]phenyl]diazenyl]naphthalene-2,7-disulfonate
Sulfonine Orange R
Sulphonol Orange R
Brown 5R
Supranol Orange RA
Kca Silk Orange R
Midlon Orange Propyl
Elite Fast Orange R
Milling Fast Orange R
Milling Fast Orange 2R
Acid Leather Orange BZR
Benzyl Fast Orange 2RN
Macid Milling Orange Propyl
sodium 3-amino-4-((Z)-(4'-((E)-(4-(tosyloxy)phenyl)diazenyl)-[1,1'-biphenyl]-4-yl)diazenyl)naphthalene-2,7-disulfonate
EINECS 219-389-5
C.I. Acid Orange 45, disodium salt
C.I. 22195
SCHEMBL16566668
NJXPQVNXQNPYRT-UHFFFAOYSA-L
DTXSID801023990
AKOS024421054
2,7-Naphthalenedisulfonic acid, 3-amino-4-((4'-((4-(((4-methylphenyl)sulfonyl)oxy)phenyl)azo)(1,1'-biphenyl)-4-yl)azo)-, disodium salt
Disodium 3-amino-4-((4'-((4-(((p-tolyl)sulphonyl)oxy)phenyl)azo)(1,1'-biphenyl)-4-yl)azo)naphthalene-2,7-disulphonate
DISODIUM 3-AMINO-4-[[4'-[[4-[[(P-TOLYL)SULFONYL]OXY]PHENYL]AZO][1,1'-BIPHENYL]-4-YL]AZO]NAPHTHALENE-2,7-DISULFONATE
NS00046854
Sodium 3-amino-4-((4'-((4-(tosyloxy)phenyl)diazenyl)-[1,1'-biphenyl]-4-yl)diazenyl)naphthalene-2,7-disulfonate