Research Article
Effect of Diffusion on Discoloration of Congo Red by Alginate Entrapped Turnip (Brassica rapa) Peroxidase
Table 1
Characteristics of Congo red [
39,
40].
| Name of the dye | Congo red | CI number | 22120 | Chemical name | 3,3′-[[1,1′-Biphenyl]-4,4′-diylbis-(azo)] bis[4-amino-1-naphthalenesulfonic acid] disodium salt. | Solubility | Soluble in water, ethanol; very slightly soluble in acetone | Molecular formula | C32H22N6O6S2Na2 | Molecular Weight | 696.67 g/mol | Color change at pH | Blue (3.0) to red (5.0) | Hue | Red in soluble state (—500 nm) | Chemical class | Di-azo |
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