The Application segmentation isolates five primary end‑use domains that drive demand for chlorine dioxide generation plants: Water Treatment, Food & Beverage Processing, Pharmaceutical Manufacturing, Pulp & Paper, and Disinfection Services. In Water Treatment, chlorine dioxide is employed for microbial control and bio‑film removal, representing the largest share of market revenue due to extensive municipal and industrial networks. Food & Beverage Processing leverages its strong oxidizing power for surface sanitation and preservation, contributing a substantial secondary share. Pharmaceutical Manufacturing utilizes chlorine dioxide for sterile processing environments, while Pulp & Paper applications focus on bleaching and effluent treatment, both reflecting niche but high‑value segments. Disinfection Services, encompassing hotel, healthcare, and transportation sanitation, account for a smaller yet growing portion as regulatory pressures increase. This market taxonomy clarifies how each application’s operational requirements and regulatory drivers shape its proportional contribution to the overall market size, informing strategic investment decisions.