Used primarily as a reactive diluent and plasticizer in unsaturated polyester resins, improving flexibility and workability without significantly reducing the glass transition temperature. Commonly found in fiberglass-reinforced plastics for marine, automotive, and construction applications. Also serves as an intermediate in the synthesis of specialty polymers and crosslinking agents, contributing to enhanced curing properties and thermal stability in coatings and adhesives. Its low volatility supports processing at elevated temperatures with minimal emissions.