Rs. 75 Description Grade Standard - Technical Grade Packaging Size - 50 kg,25 kg Molar Mass -148.11 g/mol Packaging Type -HDPE Bags Molecular Formula - C8H4O3 Phthalic anhydride (PA) is a white crystalline compound used to manufacture plasticizers, pigments, dyes and resins. PA is used in the manufacture of unsaturated polyester resins (UPR) that are usually blended with glass fibers to produce fiberglass-reinforced plastics. Principal consumer markets are the construction, marine, and transportation sectors. PA-based alkyd resins are used in paints and lacquers that go in to architectural, machinery, furniture, and fixture applications.