Magnesium hydrogen phosphate mainly has three hydrates of anhydrous, trihydrate and heptahydrate, colorless or white orthorhombic crystal or powder; slightly soluble in water, soluble in dilute acid, insoluble in ethanol, relative density 2.013; heated to 205 At ° C, one molecule of crystal water was removed. It is decomposed into pyrophosphate when heated to 550-650 °C. Magnesium hydrogen Hydroxide heptahydrate was heated to 110 ° C to form magnesium hydrogen phosphate trihydrate, and magnesium hydrogen phosphate trihydrate was heated to 205 ° C to remove 1 crystal water.

1. Light magnesium oxide method
The light magnesium oxide method is the reaction of magnesium oxide and hydrogen peroxide:
MgO+H2O═MgO2+H2O

Magnesium peroxide, chemical formula MgO2, white powder, odorless, tasteless, deliquescent. Do not dissolve in water, but will slowly decompose in water, soluble in dilute acid. Mainly used in medicine and other industries. It can be prepared by reacting a soluble magnesium salt solution with hydrogen peroxide.

Magnesium oxide is commonly known as bitter soil, also known as magnesium oxide. Magnesium oxide is a basic oxide and has the property of a basic oxide. It is a gelling material. White powder (light yellow is magnesium nitride), odorless, tasteless, non-toxic, is a typical alkaline earth metal oxide, chemical formula MgO. A white powder having a melting point of 2852 ° C, a boiling point of 3600 ° C and a relative density of 3.58 (25 ° C).

Magnesium oxide is divided into light magnesium oxide and heavy magnesium oxide. Lightweight and loose, white amorphous powder. Odorless, tasteless and non-toxic. The density is 3.58 g/cm3. Hard to dissolve in pure water and organic solvents, the solubility in water increases due to the presence of carbon dioxide. Soluble in acid, ammonium salt solution. It is converted into crystals by high temperature burning. In the case of carbon dioxide in the air, it forms a double salt of magnesium carbonate.

Magnesium gluconate (chemical formula: MgC12H22O14) is a magnesium salt of gluconic acid. White or grayish white odorless fine powder. Dissolved in water. It is obtained by dissolving magnesium oxide or magnesium carbonate in gluconic acid. Used as a nutritional supplement, buffer, curing agent, etc.

Pharmacological action
Oral administration of this product can increase the blood magnesium concentration and maintain the blood magnesium concentration after intravenous magnesium sulfate, for the treatment of pregnancy-induced hypertension syndrome.

Magnesium stearate is a white fine powder with no sand; it has a slight odor; it has a slippery feel when it comes into contact with the skin. This product is insoluble in water, ethanol or ether, and is mainly used as a lubricant, anti-adhesive agent and glidant. It is especially suitable for granulation of oils and extracts, and the prepared granules have good fluidity and compressibility. Used as a flow aid in direct compression.

The atomized magnesium alloy powder is obtained by centrifugally atomizing the magnesium alloy ingot after being melted at a high temperature, and then rapidly cooling at a low temperature to cause the alloy droplet to condense into a spherical shape.