Polyphosphates are versatile inorganic chemicals used in water treatment, detergents, food processing, ceramics, flame retardants, and fertilizers. The global polyphosphate market was valued at around USD 1.86–1.98 billion in 2024–2025 and is projected to grow to approximately USD 2.64–2.98 billion by the early-to-mid 2030s, implying a CAGR of about 4–5%. Production is geographically aligned with major phosphate and phosphoric acid producers, with significant capacities in China, the United States, Western Europe, and parts of the Middle East. Producers operate thermal and wet-process routes, converting phosphoric acid into various sodium, potassium, and ammonium polyphosphate salts.