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Chitosan is a naturally available biopolymer. It occurs as a component of crustacean shells, insect exoskeletons, fungal cell walls and plankton. In this work, chitin was extracted from mud crab shells waste. Chitosan, a useful biopolymer, was obtained from pulverized shells of crabs via demineralization, deproteination and de-acetylation. These steps were crucial for the elimination of calcium carbonate and other minerals as well as protein which are present in the shells. In this study, thedoi:10.20546/ijcmas.2021.1006.055 fatcat:n3gk4d2lcjbljebch5yigsog5i