Chemical tracers are crucial in catalysis for several reasons: 1. Mechanistic Insights: Tracers help in understanding the detailed steps of a catalytic process. 2. Kinetic Studies: They aid in measuring the rate of reaction and identifying rate-determining steps. 3. Selectivity and Efficiency: Tracers can help optimize the selectivity and efficiency of a catalytic process by identifying side reactions and undesired pathways. 4. Safety and Control: They ensure better control of industrial processes, enhancing safety and consistency.