Toxicology plays a pivotal role in safeguarding the health and well-being of individuals within occupational environments. Defined as the study of adverse effects caused by chemicals on living organisms, toxicology provides essential insights for safety professionals at every level. From ancient times to modern-day practices, the discipline of toxicology has evolved significantly, emphasizing the critical importance of understanding basic principles and concepts in workplace safety. Historical Significance: The roots of toxicology trace back to ancient civilizations, with early descriptions of toxic substances such as hemlock, opium, and toxic metals dating back to 1500 BC. Notably, Greek physician Dioscorides attempted to categorize poisons into plant, animal, and mineral categories. Over time, awareness of occupational exposures to toxic substances grew, with Paracelsus and Ramazzini documenting the adverse effects of lead and mercury on workers in various industries. Fun...