Anhydrides are a type of organic intermediate that find extensive application in the production of various industrial materials. One such example is Tetrahydrophthalic Anhydride (THPA), which is commonly used in the production of alkyd and unsaturated polyester resins, coatings, and as a curing agent for epoxy resins. THPA is an important raw material in the chemical industry and is also used as a plasticizer, surfactant, insecticide, sulfide regulator, alkyd resin modifier, pesticide, and in the manufacturing of pharmaceuticals.