Magnesium stearate, an insoluble white powder in water and many solvents, is utilized as a base material in combination with other stearate salts to improve the thermal stability of PVC. It finds application in the plastics and ABS industries, where it increases the impact resistance of PS and EPS. Additionally, it acts as a waterproofing agent in cements and plasters within the construction industry. In medicine, it functions as a lubricating agent for tablet and capsule preparation, and it serves as an emulsifying agent in the food industry. Magnesium stearate is used as a lubricant and anti-adherent in pharmaceuticals, enhances thermal stability in plastics, acts as a waterproofing agent in construction materials, serves as an emulsifying agent in food products, contributes to texture and stability in cosmetics, and functions as a flow agent in industrial applications.