一区二区免费/网络恐吓威胁怎么报案/天天爽天天碰狠狠添/国产尤物在线视频 - 91香焦国产线观看看免费

Molecular formula: NaOH
Performance: there is a sense of soap-like creamy, strong alkaline, with a variety of acids and salts for reaction, there is strong corrosive, at ambient temperature, the corrosion of steel was less, but can be dissolved tin, zinc, aluminum and other metal and produce hydrogen, on skin, fabric, paper, etc. have strong corrosive, soluble in water, ethanol and glycerol, insoluble in acetone, easy to absorb CO₂ from the air gradually turned into sodium carbonate.
Specifications: GB 209-93
NaOH liquid 30-42% of solid content 96-99%