Phthalic anhydride (PA) plays a vital role in the production of essential substances like plasticizers, pigments, dyes, and resins. It is particularly important in the manufacturing of unsaturated polyester resins (UPR), which are commonly used in fiberglass-reinforced plastics. In India, PA is in high demand from the pigments and dyes industry, thanks to the country’s significant production of organic pigments such as phthalocyanine blue, green, and high-performance pigments. Moreover, PA finds applications in the production of herbicides, insecticides, insect repellents, fire retardants, polyester polyols, and rubber scorch inhibitors. With over forty years of experience, TCL has emerged as a leading manufacturer of PA, contributing to the progress of numerous industries reliant on this vital compound.