a级大胆欧美人体大胆666,美女扒开腿让男人桶爽30分钟,欧美网站,区二区三区,国产情侣真实露脸在线

1、Chemical Name:  ZINC SULFATE

2、Molecular Formula : ZnSO₄.H₂O,  ZnSO₄.7H₂O

3、Molecular Weight: 179.49(Monohydrate), 287.58(Heptahydrate)

4、CAS: 7446-19-7（H₂O）；7446-20-0 (7H₂O)

5、Character: It is colorless or white crystalline powder, odorlessness. Efflorescence in air. Acid hydrometer is 1.957(25/4℃) to litmus. Melting point is 100℃. It’s soluble in water and glycerol, insoluble in ethanol and light toxicity, lose crystal water in 280℃.

6、Usage: It is used as food additives, animal feed, printing and dyeing, timber preservative.Used as analytical reagent.

7、Packing: It is packed with polythene bag as the inner layer, and a compound plastic woven bag as the outer layer. The net weight of each bag is 25kg.

8、Storage and Transport: It should be stored in a dry and ventilative warehouse; kept away form water and moisture during transport; unloaded with care, so as to avoid damage to bags. Furthermore, it should be stored separately from poisonous substances.