This document provides a presentation on naphthalene. It begins with an introduction that defines naphthalene as the simplest polycyclic aromatic hydrocarbon with the molecular formula C10H8. The presentation then covers the structure, history, occurrence, nomenclature, synthesis, properties, reactions, derivatives, health effects, uses, and conclusion of naphthalene. It provides details on the physical and chemical properties of naphthalene, as well as examples of reactions it undergoes such as electrophilic substitution, oxidation, nitration, reduction, and halogenation. The presentation also discusses health effects, common uses as mothballs and in producing other chemicals, and concludes with a summary of naphthalene