发表时间:2020-04-17
The precipitate of magnesium hydroxide is white.
Magnesium hydroxide is a white amorphous powder. The suspension of magnesium hydroxide in water is called magnesium hydroxide emulsion, which is called magnesium emulsion for short. Magnesium hydroxide is a colorless hexagonal crystal or white powder, which is difficult to dissolve in water and alcohol, in dilute acid and ammonium salt solution, and the aqueous solution is weakly alkaline.
The solubility in water is very small, but the part dissolved in water is completely ionized. The concentration of saturated aqueous solution is 1.9 mg / L (18 ℃). When heated to 350 ℃, it loses the water to form magnesium oxide. The natural mineral of magnesium hydroxide, brucite.
It can be used to make sugar, magnesium oxide and so on. Because magnesium hydroxide is rich in nature and its chemical properties are similar to aluminum, users began to use magnesium hydroxide instead of aluminum chloride for flavor products. It is used as analytical reagent and also used in pharmaceutical industry.