ChemCAD is a chemical process simulation software used for designing, analyzing, and optimizing chemical processes and systems. It provides tools for modeling various chemical operations, including distillation, reaction engineering, and heat exchange, allowing engineers to visualize and predict process behavior. ChemCAD is widely used in industries such as petrochemicals, pharmaceuticals, and food processing for process design and optimization. Its user-friendly interface and robust capabilities make it a popular choice among chemical engineers and researchers.