Potassium stearate, with the CAS number 593-29-3, is a white, waxy powder or flaky solid. It is the potassium salt of stearic acid, which is a saturated fatty acid. The chemical formula of potassium stearate is C18H35KO2.
It has a molecular weight of approximately 322.57 g/mol. Potassium stearate is soluble in hot water and alcohol, but insoluble in cold water. It has a melting point range of around 224 - 226°C. This product is typically provided in a high - purity form by our factory, ensuring its quality and suitability for various applications.
Potassium stearate has a wide range of applications in different industries. In the cosmetics industry, it is used as an emulsifier, stabilizer, and thickener. It helps to mix oil and water - based ingredients in creams, lotions, and other cosmetic products, ensuring a smooth and stable texture. For example, in moisturizing creams, potassium stearate keeps the oil phase well - dispersed in the water phase, preventing separation over time.
In the food industry, it can be used as an anti - caking agent. It helps to prevent the agglomeration of powders such as spices and seasonings, ensuring that they flow freely and can be easily measured and used. Additionally, in the pharmaceutical industry, potassium stearate is used as a lubricant in tablet production. It reduces the friction between the tablet and the mold during the compression process, allowing for easy ejection of the tablets without damage.
When using potassium stearate in cosmetics, it is usually added during the emulsification process. First, heat the oil and water phases separately to a suitable temperature, typically around 70 - 80°C. Then, slowly add the potassium stearate to the oil phase while stirring continuously. After that, gradually pour the water phase into the oil phase containing potassium stearate under high - speed stirring to form an emulsion. Finally, cool the emulsion slowly while continuing to stir to obtain a stable product.
In the food industry, potassium stearate is added directly to the powder products. The recommended dosage is usually around 0.1 - 0.5% by weight, depending on the specific product and the degree of anti - caking required. For tablet production in the pharmaceutical industry, potassium stearate is mixed with the other tablet ingredients in a mixer. The amount used is typically around 0.25 - 1% of the total weight of the tablet formulation.
Case 1: Cosmetics - Moisturizing Lotion
A cosmetic company was developing a new moisturizing lotion. They used potassium stearate as the primary emulsifier. By adding 2% potassium stearate to the oil phase and following the proper emulsification process, they were able to create a lotion with a smooth and creamy texture. The lotion remained stable for over six months at different storage temperatures, without any signs of oil - water separation. Consumers reported that the lotion was easy to apply and had a pleasant feel on the skin.
Case 2: Food - Spice Mix
A spice manufacturer was facing problems with the caking of their spice blends. After adding 0.3% potassium stearate to their powder mixtures, the spices became free - flowing. This not only improved the packaging process but also made it easier for consumers to measure and use the spices. The shelf - life of the spice products also increased as the caking issue was resolved.
Case 3: Pharmaceuticals - Tablet Production
A pharmaceutical company was producing pain - relieving tablets. They used 0.5% potassium stearate as a lubricant in the tablet formulation. The tablets were easily ejected from the molds during the compression process, with a smooth surface and consistent weight. The dissolution rate of the tablets met the required standards, ensuring the effectiveness of the medication.
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