Market Overview Di-isononyl phthalate (DINP) is phthalate-based plasticizer used as an additive in PVC plastics, co-polymers and resins. DINP is a high molecular weight phthalate-plasticizer. DINP is primarily used to enhance the flexibility of the various PVC products. The substantial applications of DINP are wires & cables, hoses & tubes, flooring & flooring, automobile coatings,...