methyl arsenious oxide

例句：

1. 1.The chemical was used to treat cancer in the past.
   这种化学物质过去被用来治疗癌症。
2. 2.The toxicity of this compound is well-documented.
   这种化合物的毒性已被充分记录。
3. 3.Due to its high toxicity, it's not safe for human consumption.
   由于其高毒性，对人类来说不安全。