1,1'-Carbonyldiimidazole (CDI) is a versatile coupling reagent employed in peptide synthesis, polymer functionalization, and fine‑chemical manufacturing, underpinning critical pathways in pharmaceuticals, agrochemicals, and specialty chemicals. The 1,1'-Carbonyldiimidazole market size was estimated at USD 180 million in 2025, and industry analysts project a CAGR of approximately 5.5% for the 2026‑2033 market forecast, signaling robust growth outlook and sustained industry expansion. Primary growth drivers include escalating demand for high‑purity APIs, the shift toward greener synthetic routes, and heightened investment in biopharma R&D across major economies. Key forces shaping the market are (1) rapid adoption of continuous‑flow and automated synthesis technologies, (2) tightening environmental regulations that favor low‑waste reagents, and (3) concentrated supply‑chain dynamics dominated by a few global chemical distributors. Asia‑Pacific commands the largest market share, while North America emerges as the fastest‑growing region, buoyed by advanced biotech pipelines.