Plasticizers are substances used for the purpose of reduction of brittleness in synthetic resins and production or promotion of plasticity as well as flexibility. They enhance the ability, elasticity and sturdinessáof the substance and cut down the cost in many situations. This book presents a comprehensive summary of various aspects of plasticizers. It also discusses the various applications of different types of plasticizers, inclusive of those that are based upon non-toxic andáhighly effectiveápyrrolidones, and aánovel sourceáof collagen based bio-plasticizers that can be attained from discarded materials from aánatural source. The book also talks about the functions of plasticizers in ion selective electrode sensor, plastics and other areas. It will serve as a significant reference for college students, researchers and scientists, engineers and also, industrialists working in polymer, pharmaceutical and environmental industries.