Disperse blue 79:1

• CAS: 3618-72-2
• Catalog Number: ACM3618722
• Category: Main Products
• Molecular Weight: 625.38
• Molecular Formula: C₂₃H₂₅BrN₆O₁₀
• Synonyms: AZODYE-2; Disperse Blue 79:1
• IUPAC Name: 2-[5-acetamido-N-(2-acetyloxyethyl)-4-[(2-bromo-4,6-dinitrophenyl)diazenyl]-2-methoxyanilino]ethylacetate
• SMILES: CC(=O)NC1=CC(=C(C=C1N=NC2=C(C=C(C=C2Br)[N+](=O)[O-])[N+](=O)[O-])OC)N(CCOC(=O)C)CCOC(=O)C
• InChI Key: JSRUDOBCTLPTFO-UHFFFAOYSA-N
• Boiling Point: 796.7ºC at 760mmHg
• Melting Point: 149-151ºC
• Flash Point: 435.6ºC
• Density: 1.55g/cm³
• EC Number: 222-813-1
• Exact Mass: 624.08200

Case Study

Solubility Studies of Disperse Dyes Such as Disperse Blue 79:1 In Supercritical CO2 and N2O

Lin, Ho-mu, et al. The Journal of supercritical fluids, 2004, 32(1-3), 105-114.

This study explored the dissolution characteristics of Disperse Blue 79: The study investigated the dissolving properties of Red 82 and Modified Yellow 119 in supercritical CO2 and N2O at 393.2 K and 30 MPa over various contact durations. The study also determined the equilibrium solubility of these dyes in supercritical fluids over a temperature range of 353.2 to 393.2 K and at pressures up to 30 MPa.
Key Findings
The experimental extraction results indicated that the effective mass transfer coefficient for Red 82 in carbon dioxide was the highest, while that for Modified Yellow 119 was the lowest. The findings also demonstrated that a contact time of 1000 seconds was adequate for the gas phase to reach equilibrium.
Moreover, solubility increased significantly-approximately 100-fold-as the pressure rose from 15 to 30 MPa. The order of solubility in supercritical carbon dioxide was found to be Disperse Red 82 > Blue 79:1 > Modified Yellow 119. Furthermore, nitrous oxide showed superior solubility for Modified Yellow 119 compared to carbon dioxide.
The Chrastil equation effectively correlated the solubility data within experimental limits, yielding an overall average absolute deviation (AAD) of 15.8%. The Sung-Shim model offered a slight improvement in accuracy over the Chrastil model for the nitrous oxide and Modified Yellow 119 system.

Investigation Focused on How Disperse Dyes with Different Esterification Degrees (Orange 30, Red 167:1, Blue 79:1) Affect the Dyeing Characteristics of PET

Wang, Mingyue, et al. The Journal of Supercritical Fluids, 2021, 175, 105270.

Supercritical carbon dioxide (SC-CO2) dyeing is an effective textile dyeing method for polyethylene terephthalate (PET) because SC-CO2 plasticizes PET and improves its dyeing characteristics. The research investigated disperse orange 30, disperse red 167:1 and disperse blue 79 along with their partially esterified analogs to determine how esterification levels affect dyeing performance in PET fibers using supercritical CO2.
Key Findings
No definite relationship existed between changes in light absorbance and melting points due to ester groups and the color variations these groups caused. Instead, the primary factors influencing the dyeing properties of disperse orange 30, disperse red 167:1, and disperse blue 79:1 were the alterations in solubility and affinity resulted from the presence of ester groups. PET showed reduced dye absorption of 37.7%, 83.6%, and 54.6% for unesterified disperse orange 30, disperse red 167:1, and disperse blue 79:1 respectively when compared to their fully esterified versions due to decreased solubility and affinity.