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The efficient procedure for preparation of azo-based chitosan biopolymer using chitosan and 2-(4-dimethylaminophenylazo)benzoic acid (methyl red) in isopropyl alcohol under mild condition has been demonstrated. After the reaction, the product was successively washed with an isopropyl alcohol and water mixture (5:1, v/v) and dried in air. Finally, the obtained product was confirmed and characterized...
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