In addition to the potential as a preservative for food or drink, chitosan has been widely used
as drug coating intended to optimize the absorption of the drug in the target cell. These properties of
chitosan such as biodegradable, biocompatible, non-immunogenic, non-carcinogenic make chitosan
suitable for use in food technology. However, the use of chitosan has a drawback, i.e. it can be
dissolved only in an acidic solution (pH < 6) and cannot be dissolved in a physiological
environment (pH = 7.4) [7]. To overcome it, this study modified the chitosan into its derivatives,
i.e. N,O-Carboxymethyl Chitosan. N,O-Carboxymethyl Chitosan is a derivative of chitosan that is
hydrophilic in nature, making it dissolved in either an acid, neutral, or alkaline condition.