The book Characterization of Organic Compounds consists of 24 chapters that explore the methods of synthesis, physical and chemical properties, and classifications of organic compounds. It delves into topics such as the reactivity of organic compounds, saturated hydrocarbons (alkanes and cycloalkanes), alkenes, dienes, polyenes, alkynes, arenes, and polynuclear arenes with condensed rings. Additional chapters cover halogenated derivatives, hydroxyl compounds, carbonyl compounds, carboxylic acids and their functional derivatives, as well as amines, azo and diazo compounds, heterofunctional carboxylic acids, proteinogenic ?-amino acids, peptides, carbohydrates, aromatic heterocyclic compounds, alkaloids, nucleosides, nucleotides, nucleic acids, hydrolyzable lipids, natural compounds with polyisoprene skeletons, and steroids. The material also emphasizes the classification of organic compounds and provides a detailed overview of the chemical reactions characteristic of these compounds.