This book is mainly provided for the researchers and students working in the field of physical and organic chemistry. It helps to study the hydrolysis of pesticides and insecticides. With the growing use of pesticides and insecticides in the field of agriculture and their accumulation in the environment becomes unavoidable. The solubility in water and presence in the soil of these compounds are very harmful to the living organism. This book is chiefly focuses on the examination of kinetics and hydrolysis of chloropyrifos catalyzed with different types of amines like n-butylamine, Imidazole, hydrazine, ammonia, and ethanolamine. High-performance liquid chromatographic methods were developed for the effect of amines on the hydrolysis of chloropyrifos [O,O-diethyl (O-3,5,6-trichloropyrid-2-yl) phosphorothioate] have been considered in different pH medium. Apart from the field of the analytical book also expand the interest in the field of environmental and analytical chemistry.