The Polyethersulfone for membrane segmentation by application reveals five primary domains that collectively shape market dynamics. Water and wastewater treatment accounts for roughly 38% of total revenue, driven by stringent discharge regulations and the material’s superior thermal stability, which enable long‑life ultrafiltration modules. Food and beverage processing contributes about 22%, where PES membranes are valued for their chemical resistance to acids, sugars, and cleaning agents, supporting high‑throughput filtration lines. Pharmaceutical and biotech represents 18%, reflecting the need for sterile, low‑extractable membranes in drug purification and cell culture; the polymer’s low protein binding enhances product yield. Chemical processing holds 14% of the market, leveraging PES’s ability to withstand aggressive solvents and high temperatures in catalytic reactors and solvent recovery. Finally, gas separation comprises the remaining 8%, a niche segment where PES’s selective permeability is exploited for CO₂ capture and hydrogen purification. These application shares are illustrated in the accompanying pie‑chart, underscoring how each sector’s technical requirements translate into proportional market share.