次磷酸盐

例句：

1. 1. This compound is used as a catalyst in the production of plastics.
   这种化合物在生产塑料中用作催化剂。
2. 2. The chemistry of this compound is complex and requires special handling.
   这种化合物的化学性质复杂，需要特殊处理。
3. 3. The use of this compound has been banned in many countries due to its toxicity.
   由于其毒性，这种化合物的使用在许多国家已被禁止。