Rden. They have been identified significant environmental hazards by the United burden. They’ve been identified as as important environmental hazards by the Usa Environmental Protection Agency [4]. regard, regard, polyhydroxyalkanoates States Environmental Protection Agency [4]. In thisIn this polyhydroxyalkanoates (PHAs), a(PHAs), a biodegradable alternative to petroleum-based polymers, have been recognized biodegradable alternative to petroleum-based polymers, happen to be recognized and used and used in food packaging. Though PHA biodegradable nature, their their biological in meals packaging. Even though PHA holds a holds a biodegradable nature,biological and and industrial production is restricted and involves fees [8]. [8]. Some other biodegradacommercial production is restricted and involves highhigh charges Some other biodegradable ble Irbesartan impurity 14-d4 MedChemExpress polymers explored include alginate, gelatin, tamarind chitosan and and its derivapolymers explored involve alginate, gelatin, tamarind gum,gum, chitosanits derivatives, tives, agar, and so forth. these polymers, chitosan and its derivatives have received received significantly agar, and so forth. AmongAmong these polymers, chitosan and its derivatives havemuch attention attention within the food packaging sector [1]. Besides the biodegradable chitosan and its inside the meals packaging business [1]. Apart from the biodegradable nature ofnature of chitosanInt. J. Mol. Sci. 2021, 22,4 ofderivatives, they also possess antimicrobial and antioxidant properties [1]. The chitosan derivatives (cationic) have superior antimicrobial actions against Gram-positive bacteria evaluate to Gram-negative bacteria or yeast [9]. The cationic charge of chitosan and its molecular isoCA-4 Microtubule/Tubulin weight firmly command its antimicrobial activity. This added antimicrobial property allows researchers to create functional films that could significantly improve the shelf life of meals solutions. The existing evaluation will talk about the properties of chitosan, strategies for creating meals packaging systems, and their applications in meals product storage and safety. two. Properties of Chitosan The food processing industries that deal with the distinct types of seafood produce several waste solutions, e.g., skins, shells, scales, internal tissues, etc. The weight of those wastes is often as high as 70 in the seafood supply animal or organisms. The improper disposal (e.g., landfill, dumping in the sea/local water bodies, or burning) of these wastes can bring about improved environmental hazards. Hence, researchers have proposed the valorization on the waste products to the extent attainable, which can lower the burden around the atmosphere to an awesome extent. The food industries coping with crustaceans have generated 75 of waste goods [4]. The waste merchandise from the crustacean market are rich in proteins and chitin (a naturally occurring polysaccharide). The polysaccharide also can be extracted from the biomass of fungi, fly larvae, annelids, and yeasts (Figure three) [1,four,10]. The organic abundance of chitin is second-most, just after the cellulose. On the other hand, chitin is the most abundant polymer of all-natural origin [4]. Chitin is definitely an amino polysaccharide. Chemically, chitin is composed of -1,four linked 2-(acetylamino)-2-deoxyd-glucose components (Figure four) [4,10,11]. The degree of acetylation is 90 . The general nitrogen content material in chitin is 7 , though the nitrogen to carbon (N/C) ratio is 0.146. This naturally occurring polymer is biodegradable, biocompatible, and has been explored for many meals applications.