Introduction Diisononyl Phthalate Prices remained a key point of attention in the global chemical and plasticizer market during the fourth quarter of 2025. As one of the most widely used plasticizers in the production of flexible polyvinyl chloride (PVC), Diisononyl Phthalate (DINP) plays a crucial role in industries such as construction, automotive manufacturing, wire and cable production, consumer goods, and packaging materials. The market dynamics of DINP are closely link