Name: Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate, is researched, Molecular C18H14N2Na2O8S2, CAS is 25956-17-6, about Red dye 40 removal by fixed-bed columns packed with alginate-chitosan sulfate hydrogels. Author is Verduzco-Navarro, I. P.; Jasso-Gastinel, C. F.; Rios-Donato, N.; Mendizabal, E..
Modified Chitosan was used for the removal of red dye 40 from aqueous solutions at a pH of 5.0. The adsorption was carried in fixed-bed columns packed with beads of Alginate-Chitosan Sulfate (Alg-ChS) hydrogels. Two columns of 13 and 33 cm of height and two feed rates (20 and 40 mL/h) were used. The pH of the dye solutions at the exit of the columns was much higher than the one registered at the entrance which can be explained by protons transfer from the aqueous solution to the amino and hydroxyl groups of the Alg-ChS and to the carboxilate groups of the alginate. The increase in pH favored the removal of the dye. The breakthrough time and the amount of dye removed decreased when the flow rate was increased. Greater dye removal was achieved when the higher column was used. After the breakthrough time, the columns continued to remove appreciable amounts of dye and even after 50 h of operation, the columns did not reach saturation
As far as I know, this compound(25956-17-6)Name: Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.
Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics