Acid Blue 9

• CAS: 2650-18-2
• Catalog Number: ACM2650182
• Category: Main Products
• Molecular Weight: 782.95
• Molecular Formula: C37H36N2O9S3·2NH₃
• Appearance: Blue to purplish red crystalline powder

Case Study

Adsorption of the dyes Acid Blue 9 on chitosan

Dotto, G. L., and L. A. A. Pinto. Journal of hazardous materials 187.1-3 (2011): 164-170.

The adsorption of the food dyes Acid Blue 9 and Food Yellow 3 on chitosan was studied. The effect of stirring rate on the kinetics and mechanism was verified. IR analysis was performed before and after adsorption to verify the adsorption properties. Adsorption experiments were performed in a batch system with different stirring rates (15-400 rpm). The kinetic behavior was analyzed by pseudo-first-order, pseudo-second-order, and Elovich models. For both dyes, the adsorption occurred on both film and intraparticle diffusion, and an increase in stirring rate resulted in a decrease in the film diffusion resistance. Therefore, the film diffusion rate increased the adsorption capacity and the intraparticle diffusion rate increased.
Chitosan samples (250 mg) were diluted with 0.8 L of distilled water and their pH was corrected (pH 3) with 0.1 N of split phosphate/citric acid. The solution was stirred for 30 min to allow the pH to reach equilibrium, which was measured before and after the adsorption process (Mars, MB10, Brazil). To each solution of chitosan, 50 mL of solution and 2 g L of dye were added and completed to 1 L with distilled water to give an initial concentration of 100 mg L of dye in all solutions. The experiments were conducted in jar tests at room temperature (25 ± 1 C). The stirring rates used were 15, 50, 100, 200, and 400 rpm. This range was based on preliminary tests. Aliquots were removed at intervals of preset time (2-120 min). Aliquots were removed within 24, 36, and 48 h to obtain equilibrium adsorption capacity. Dye concentrations were measured by spectrophotometer tests at 408 and 480 nm for Acid Blue 9 and Food Yellow 3, respectively.

Electrodialysis was used to study the desalination of acid blue 9

Xue, Chang, et al. Journal of Membrane Science 493 (2015): 28-36.

Currently, nanofiltration dominates membrane applications for dye desalination and purification, and is very effective in producing low-salt dyes from raw dyes with high inorganic salt impurity content. The study proposed an optimized electrodialysis desalination process to fill this gap. Long-term system performance stability and reasonable process cost were achieved. Almost all SO4 2- in acid blue 9 can be removed, and the residual [Cl-] in the final aqueous dye product (200 g/L) is only 130 mg/L (96% removal). The total purification cost of dye solids is $0.097/kg, which is very economically competitive.
The gasket size used in the stack is 260 mm (length), 130 mm (width), 0.9 mm (thickness), and the active area is 187 cm. It has a dual-chamber configuration with co-current flow, consisting of alternating anion exchange membranes and cation exchange membranes. There are four repeated unit pairs in the stack. Select NaCl solution (5000 mg/L) as the electrode rinse solution, prepare NaCl (1000 mg/L) as the concentrate to receive salt impurities. Circulate low-hydrochloric acid blue 9 aqueous solution (200 g/L) as the diluent flow. The volume of each solution is 1.0 L. All flows in the ED stack are driven by a four-channel metering pump, and the flow rate of each flow is adjusted to 9.6 L/h.

Biodegradation studies on acid blue 9 dye

Neetha, J. N., et al. Environmental Technology & Innovation 11 (2018): 253-261.

Dyes that are reluctant to degrade due to their complex structure require a cost-effective and environmentally friendly degradation technology. Bacillus fermus isolated from the Gram-positive bacterium Annona reticulata was investigated for the degradation of Acid Blue 9 dye. Among the various carbon sources used, sucrose proved to be an efficient carbon source yielding 97% decolorization. Maximum degradation was observed at 3 g/L sucrose concentration and 3% v/v inoculum concentration. Decolorization was confirmed from the results obtained by UV-Vis spectrophotometer at 579 nm. The possible biodegradation pathways were obtained by analysis using liquid chromatography-mass spectrometry technique. It was also observed that the known degradation products induced less chromosomal aberrations compared to untreated Acid Blue 9.
Decolorization experiments were performed in 100 ml conical flasks under aerobic conditions. Minimal salt medium containing 6 g/L of Na2HPO4, 3 g/L of KH2PO4, 5 g/L of NaCl, 2 g/L of NH4Cl, 0.1 g/L of MgSO4 and sucrose was used as carbon source for nutrition and maintenance of microorganisms. Acid Blue-9 was supplemented to the minimal medium at different concentrations ranging from 200 mg/L to 500 mg/L. Triplicate experiments were performed for all concentrations and parameters.

Measuring the quantum efficiency of photodegradation of acid blue 9

Caudillo-Flores, Uriel, et al. Applied Catalysis A: General 550 (2018): 38-47.

A series of highly active catalysts were obtained from the same precursor and calcined at different temperatures to produce single-phase anatase and anatase-rutile composite powders. The performance of the catalysts was compared and evaluated by measuring the optical properties of the materials and calculating the photodegradation efficiency of the multifunctional dye Acid Blue 9. The physicochemical properties of the catalysts were analyzed using X-ray diffraction, porosimetry, UV-Vis and photoluminescence spectroscopy, and their stability under the reaction conditions was tested. The performance of the materials was quantitatively analyzed by calculating the reaction rate and total organic carbon (TOC) observables as well as the apparent and real quantum efficiency parameters.
The photocatalytic activity of the TiO powders was evaluated by the degradation of Acid Blue 9 dye (AB9). The reaction was carried out in a vertical, annular, 0.24 L volume, heterogeneous and completely mixed reactor. The stability of the photocatalyst was evaluated by recycling tests. The photoreactor was operated in semi-continuous mode, i.e., a certain amount of AB9 concentrate was added to the reaction system at the end of each cycle (when the suspension was completely decolorized) to fix the initial concentrations of the photocatalyst and AB9 dye used in the photoactivity evaluation of each cycle. Gravity sedimentation tests were performed in selected recycling tests (cycles 1 and 6). After complete photodegradation of the dye, the resulting suspension (catalyst-liquid) was placed in a 0.25 L graduated cylinder to determine the sedimentation time.

Custom Q&A

What is the molecular formula of Acid Blue 9?

The molecular formula of Acid Blue 9 is C37H34N2Na2O9S3.

What is the molecular weight of Acid Blue 9?

The molecular weight of Acid Blue 9 is 792.9 g/mol.

What are some synonyms for Acid Blue 9?

Some synonyms for Acid Blue 9 are Brilliant Blue FCF, Erioglaucine disodium salt, and Brilliant Blue.

When was Acid Blue 9 first created?

Acid Blue 9 was created on July 19, 2005.

What is the IUPAC Name of Acid Blue 9?

The IUPAC Name of Acid Blue 9 is disodium;2-[[4-[ethyl-[(3-sulfonatophenyl)methyl]amino]

What is the Canonical SMILES of Acid Blue 9?

The Canonical SMILES of Acid Blue 9 is CCN(CC1=CC(=CC=C1)S(=O)(=O)[O-])C2=CC=C(C=C2)C(=C3C=CC(=[N+](CC)CC4=CC(=CC=C4)S(=O)(=O)[O-])C=C3)C5=CC=CC=C5S(=O)(=O)[O-].[Na+].[Na+]

What is the CAS number of Acid Blue 9?

The CAS number of Acid Blue 9 is 3844-45-9.

How many hydrogen bond acceptors does Acid Blue 9 have?

Acid Blue 9 has 10 hydrogen bond acceptors.

What is the UNII of Acid Blue 9?

The UNII of Acid Blue 9 is PPQ093M8HR.

What is the Wikipedia page for Acid Blue 9?

The Wikipedia page for Acid Blue 9 is Brilliant_blue_FCF.