This course explores the scientific study of the composition, structure, properties, and chemical behavior of wood. It examines the major wood constituents, including cellulose, hemicelluloses, lignin, and extractives, and their influence on wood properties and utilization. The course also covers the principles of wood treatment, preservation, and deterioration, emphasizing the application of chemical principles to understand how wood degrades through biological and environmental factors and how treatment technologies enhance its durability and performance. Understanding the chemical aspects of wood enables the development of useful chemical products, bio-based materials, and other value-added applications from wood resources.