国产69精品久久久久久久久久久久,久久久久国产精品,久久精品99久久久久久久久,亚洲午夜精品久久久久久APP,久久久久久久久久久久久久久,Xx性欧美肥妇精品久久久久久

Appearance And Properties:green crystal, orthorhombic system.
PH Value：4.5
Relative Density：2.031、1.98（7水物）、melting point 31.5℃
Relative Density (Water =1)：2.07
Boiling Point (℃)：840（Anhydrous）
Molecular Formula：NiSO4 · 6H20
Molecular Weight：262.86
Main Ingredients：Pure
Solubility：Easily soluble in water, slightly soluble in ethanol and methanol, its aqueous solution is acidic, slightly soluble in acid, ammonia