• Phthalic anhydride appears as a colorless to white lustrous solid in the form of needles with a mild distinctive odor.
• Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. Phthalic anhydride is a principal commercial form of phthalic acid.
• Phthalic anhydride is widely used worldwide for synthesis of resins and unsaturated polyester resins.
• Phthalic anhydride are commonly used in paints, varnishes and various plastic coatings.
• Also used as plasticizers for PVC and other plastics, especially where temperature stability is required, as for example in coatings for wires and cables.
• Also used as agricultural fungicides and amines.