ethylidene cyanhydrin

例句：

1. 1. This compound is used as a preservative in food packaging.
   这种化合物被用作食品包装的防腐剂。
2. 2.The process involves reacting ethylene and carbon dioxide to produce ethylidene cyanhydrin.
   这个过程涉及将乙烯和二氧化碳反应以产生乙二醛缩二脲。
3. 3. Ethylidene cyanhydrin is a key intermediate in the production of polyurethane foam.
   乙二醛缩二脲是生产聚氨酯泡沫的关键中间体。