Acid red 42

• CAS: 6245-60-9
• Catalog Number: ACM6245609
• Category: Other Products
• Molecular Weight: 505.49
• Molecular Formula: C22H16N3NaO6S2
• Description: Acid Red 42 is a synthetic dye that belongs to the Acid Dye class.; Acid Red 42, also known as C.I. Acid Red 42, Acid Red G, or Acid Scarlet 3R, is a specific dye within the Acid Dye category.
• Synonyms: Acid Red 42;2-Naphthalenesulfonic acid, 6-amino-4-hydroxy-5-2-(phenylsulfonyl)phenylazo-, monosodium salt;Acid red 42 (C.I. 17070);C.I. Acid Red 42;6-Amino-4-hydroxy-5-[
• IUPAC Name: sodium;6-amino-5-[[2-(benzenesulfonyl)phenyl]diazenyl]-4-hydroxynaphthalene-2-sulfonate
• Canonical SMILES: C1=CC=C(C=C1)S(=O)(=O)C2=CC=CC=C2N=NC3=C(C=CC4=CC(=CC(=C43)O)S(=O)(=O)[O-])N.[Na+]
• InChI: InChI=1S/C22H17N3O6S2.Na/c23-17-11-10-14-12-16(33(29,30)31)13-19(26)21(14)22(17)25-24-18-8-4-5-9-20(18)32(27,28)15-6-2-1-3-7-15;/h1-13,26H,23H2,(H,29,30,31);/q;+1/p-1
• InChI Key: HJBFOCFLBVMVCF-UHFFFAOYSA-M
• Solubility: Soluble in water for red, soluble in ethanol purplish red color.
• Appearance: Powder
• Application: Acid dyes are water-soluble anionic dyes commonly used for dyeing protein fibers such as silk, wool, and nylon, as well as other materials like leather and synthetic fibers.
• Storage: Store at 2-8 ℃
• Absorbance: min. 1,800(1.5g/L AcONH4 sol., 564.0 to 568.0 nm)
• Complexity: 914
• EC Number: 228-359-0
• Exact Mass: 505.038
• Features And Benefits: The strong sulfuric acid for dark purple, to orange diluted. In water solution to join strong hydrochloric acid have red brown precipitation; Add sodium hydroxide have purplish red precipitate
• MDL Number: MFCD00010180
• PSA: 179.07
• XLogP3: 7.0227
• λmax: max. 564.0 to 568.0 nm(1.5g/L AcONH4 sol.)

Case Study

Research on Sorption of Acid Red 57

Alkan, Mahir, et al. Journal of hazardous materials 116.1-2 (2004): 135-145.

The adsorption of acid red 57 by natural mesoporous sepiolite was studied to measure the ability of this mineral to remove colored textile dyes from wastewater. To this end, a series of batch adsorption experiments of acid red 57 from aqueous sepiolite solutions as a function of parameters such as pH, ionic strength and temperature were systematically studied. Adsorption equilibrium is reached within 1 hour. The removal rate of Acid Red 57 decreased with pH from 3 to 9 and temperature from 25 to 55°C, and increased with ionic strength from 0 to 0.5 mol·L.
Adsorption experiments were performed by shaking 0.5 g of sepiolite sample with 50 mL of aqueous solution in a series of 100 mL polyethylene flasks. Each polyethylene flask was filled with 50 mL of dye solutions of different concentrations and adjusted to the desired pH, ionic strength, and temperature. Add a known amount of adsorbent to each polyethylene flask and stir for the desired period of time, up to approximately 1 hour. Preliminary experiments show that equilibrium is reached within 1 h. Longer equilibrations give almost the same absorption. Therefore, a final contact time of 1 h was selected for all equilibrium tests. At the end of the adsorption period, the solution was centrifuged at 3000 rpm for 15 min and the concentration of residual dye was determined with the help of a UV-visible spectrophotometer. Measurements were performed at a wavelength λ = 513 nm, which corresponds to the maximum absorbance. A dye-free blank was used for each series of experiments. All adsorption experiments were performed at 25 C and pH 6.0 in acid red 57 solution, except for experiments investigating the effects of temperature and pH. The effect of pH was observed by studying dye adsorption in the pH range 3-9.