国产福利91精品一区,免费看一级片,久久久久国产日韩精品亚洲午夜,开放性按摩在线观看,无码少妇特级黄色视频,国产精华午夜福利网站,亚洲丨级a级福利大片

【Molecular formula】:  C₃H₉NO₃S
【CAS NO.】: 3687-18-1 

【Molecular weight 】：139.169
【Introduction】：Important medical intermediate.

【Quality parameters】：

【Storage】：Use as soon as possible at low temperature, avoiding moisture or impurity.
【Packing】：25kg in paperboard drum or according to users.