It is divided into two types: light magnesium oxide and heavy magnesium oxide. Lightweight volume, white amorphous powder. Odorless, odorless, and non-toxic. Density 3.58g/cm3. It is difficult to dissolve in pure water and organic solvents, and its solubility in water increases due to the presence of carbon dioxide. Soluble in acid and ammonium salt solutions. Transformed into crystals by high-temperature burning. Generate magnesium carbonate complex salt when encountering carbon dioxide in the air. Heavy and compact in volume, it is a white or beige powder. It is easy to combine with water and absorb moisture and carbon dioxide when exposed to air. Easy to solidify and harden when mixed with magnesium chloride solution