被两男人手指伸进去调教_印度精品av三级_jizz成熟丰满韩国女人剧情_91免费看片._精品xxxx户外露出视频_日韩av网址在线_黑人玩欧美人三根一起进_韩国伦理片两男一女_水果派av解说免费观看 _ass日本漂亮丰满ass

Pic:

Value:

98%

CAS NO.:

10424-65-4

Molecular Formula:

C₄H₁₂NOH·5H2O

Physical properties:

white crystal

Use:

Used as catalyst in organic silicon and other industries, etc.

Package:

250g bottle or 25kg drum

Precautions:

Very easy to absorb moisture, has a certain odor of ammonia, with strong alkaline, can rapidly absorb carbon dioxide in the air, the formation of carbonate organic alkali, with strong corrosion