Food-grade magnesium stearate, as an important food additive, plays an indispensable role in the food industry due to its unique physical and chemical properties.

　　I. Basic Properties of Food-Grade Magnesium Stearate

　　Food-grade magnesium stearate is a fine, white, non-gritty powder. It has a slight odor and a slippery feel when in contact with the skin. It is insoluble in water, ethanol, and ether, but soluble in hot water and hot ethanol. When exposed to acids, magnesium stearate decomposes into stearic acid and the corresponding magnesium salt. These properties give magnesium stearate a wide range of applications in the food industry.

　　II. Main Uses of Food-Grade Magnesium Stearate

　　Emulsifier: Magnesium stearate can increase the stability of food, prevent oil and water separation, and thus improve food quality.

　　Anticaking agent: In food, magnesium stearate can maintain the dryness of food, prevent caking of granular or powdery foods, and extend the shelf life of food.

　　Thickening agent: Magnesium stearate can also be used as a thickening agent to change the taste and texture of food, making it more delicious.

　　Specifically, magnesium stearate is widely used in the production and processing of candies, candied fruits, pastries, chewing gum, and some dairy products. In candies, magnesium stearate can improve the taste and texture; in candied fruits, it prevents caking; in pastries and chewing gum, magnesium stearate improves the taste and texture; in some dairy products, magnesium stearate increases the stability and viscosity.

　　III. Safety Standards of Magnesium Stearate

　　As a food additive, the safety of food-grade magnesium stearate has always been a concern. According to GB1886.91—2016, the national standard for food safety, magnesium stearate should be refined from the compound of magnesium oxide and edible solid mixed fatty acids (mainly stearic acid). At the same time, the sensory requirements, physicochemical indicators, etc., of magnesium stearate are clearly defined to ensure its safety and quality.

　　IV. Application Notes

　　The following points should be noted when using food-grade magnesium stearate:

　　The amount used should be reasonable and legal, avoiding excessive use.

　　It should meet food safety standards to ensure product quality.

　　During storage and transportation, it should be placed in a cool, dry, dark, and high-temperature-free place to prevent deterioration or failure.

　　In summary, food-grade magnesium stearate plays an important role in the food industry due to its unique physical and chemical properties. However, when using it, it is necessary to strictly abide by safety standards and precautions to ensure its safety and effectiveness.