Phthalic anhydride is an important chemical raw material which is mainly used in the production of plasticizer, alkyd resins and unsaturated polyester resins.

• 摘要苯酐（邻苯二甲酸酐）是一种重要的化工原料，主要应用于增塑剂、醇酸树脂、不饱和聚酯树脂的生产。