I.Magnesium Stearate Manufacturer- Synthesis Methods:

　　1. Preparation of Sodium Stearate: Dissolve 4.25 parts of sodium hydroxide in 50 parts of water, and heat to 85°C for later use. Add 25 parts of stearic acid to the reaction kettle, and heat and dissolve with stirring in 500 parts of water, adjusting the temperature to 85-90°C. Slowly add the prepared sodium hydroxide solution to the stearic acid aqueous solution with stirring, maintaining the temperature at 75-80°C until the reaction is complete. Keep the product sodium stearate solution warm for later use.

　　Preparation of Magnesium Stearate: Dissolve 15 parts of magnesium sulfate in 150 parts of water, heat to 55°C, and slowly add it to the prepared sodium stearate solution. Carry out the metathesis reaction with stirring. The magnesium stearate precipitate generated by the reaction is a solid. After the reaction, allow to stand to separate the supernatant, then wash with water, centrifuge to dehydrate, and dry at 80-85°C to obtain the finished product.

　　2. Neutralize 46.6 grams of stearic acid with 164 ml of 1 mol/L sodium hydroxide solution in 2L of water to obtain 50 grams of sodium stearate. Heat the prepared sodium stearate solution to 80°C, and dropwise add a solution of 20 grams of magnesium chloride dissolved in 100 ml of water, continue stirring, and a white precipitate will quickly precipitate. After cooling, filter, wash with water until no chloride ions are present, and finally wash with ethanol. Place 10g of the product in a vacuum desiccator with concentrated sulfuric acid for 4 weeks to obtain product A [Mg(C18H35O2)2·2H2O]. Dissolve the remaining product in benzene, heat to reflux for 20 minutes, pour out the upper yellow liquid layer while hot, and evaporate to dryness. The resulting solid can be recrystallized from benzene to obtain product B [Mg(C18H35O2)2].

　　II.Magnesium Stearate Manufacturer- Application Areas

　　1. Magnesium stearate is used as a heat stabilizer for polyvinyl chloride, and is also a raw material (excipient and lubricant) for cosmetic powders, skin creams, and tablets; it is used in wood flour to make it lubricated, bright, and transparent; and as a transparent leveling agent in the coatings industry.

　　2. Widely used in food, medicine, coatings, plastics, rubber, textiles, etc.

　　3.Magnesium Stearateis a new type of pharmaceutical excipient that can be used as a film-coating material for solid preparations, a thickener for colloidal liquid preparations, a suspending agent, etc.

　　4. In powder products, cosmetics can improve adhesion and lubricity, and can also be used as a raw material for tablets.