乙酸酐

例句：

1. 1. This compound is used as a catalyst in the synthesis of plastics.
   这种化合物在合成塑料中用作催化剂。
2. 2. The reaction between this reagent and the organic material produces acetic anhydride.
   这种试剂与有机材料的反应产生乙酸酐。
3. 3.Acetic anhydride is a key intermediate in the production of acetone and methyl acetate.
   乙酸酐是生产丙酮和甲基乙酸的关键中间体。