Reduced Yield: The presence of byproducts often means that the yield of the desired product is lower than expected. Catalyst Deactivation: Some byproducts can poison the catalyst, reducing its activity and lifespan. Purification Costs: Additional steps may be required to separate and remove byproducts, increasing the overall cost of the process. Environmental Concerns: Toxic byproducts may pose significant environmental and health risks if not managed properly.