Succinic anhydride is a cyclic anhydride with the chemical formula C4H4O3. It is a white solid that is used as a monomer in the synthesis of polyesters and other polymers. Succinic anhydride can react with diols or diamines to form polyester or polyamide chains, respectively.

琥珀酸酐是一种环酐，化学式为 C4H4O3。它是一种白色固体，用作合成聚酯和其他聚合物中的单体。琥珀酸酐可以分别与二醇或二胺反应形成聚酯或聚酰胺链。