Global purified isophthalic acid market size was valued at USD 850 million in 2025. The market is projected to grow from USD 850 million in 2026 to USD 1,500 million by 2034, exhibiting a CAGR of 6.5% during the forecast period. Purified Isophthalic Acid (PIA) is a high‑purity aromatic dicarboxylic acid that serves as a critical monomer for producing superior polyester resins, engineering plastics, and advanced coating binders. Its refined molecular structure, typically exceeding 99.9%...