This edited collection deals with the structure-property relationships and biomedical applications of carboxymethyl chitosan derivatives in different fields. Readers will detailed overview of the preparatory methods involved in the derivatives of carboxymethyl chitosan and its interaction with metal ions. The chapters provide a detailed overview of the different types of carboxymethyl chitosan derivatives, including the preparatory methods involved, the interactions with metal ions, and the antimicrobial activities. These different forms of carboxymethyl chitosan derivatives are found to be potentially used in food packaging, in enhancing saltiness, as biosensors, and also as wound dressing. Chapters are also devoted to the fabrication and biomedical applications of carboxymethyl chitosan derivatives-based nanofibers as well as the interaction of carboxymethyl chitosan with blood in blood clotting and the underlying mechanism. Contributing authors additionally explore topicsrelated to carboxymethyl chitosan-based hydrogels, films, scaffolds, fibers, and composites. Finally, this volume presents the current challenges in developing biomedical products based on carboxymethyl chitosan derivatives. This book will be of interest not only to chemists, but to all scientists working in the fields of  material/environmental science, biological science, and biomaterials. These chapters are great resources for any researcher who works with structure-property relationships, biological interactions, and the applications of carboxymethyl chitosan derivatives in different biomedical fields.