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Specifications
| USP Grade | USP35-NF30 |
| Appearance | A fine, white or almost white, crystalline powder, practically insoluble in water and in alcohol |
| Assay (CaO) | 9.0~10.5% |
| Stearic acid and palmitic acid | 90% min |
| Identification A | The tests for calcium |
| Identification B | The fatty acids Congealing Temperature 54°C min |
| Loss on Drying | 4.0% max |
| Heavy Metals | 10 ppm max |
| Stearic acid | 40–60% |
Applications
Calcium stearate (CAS 1592-23-0) is a versatile compound widely used in the plastics, rubber, cosmetics, and pharmaceutical industries. In plastics, it functions as a lubricant and release agent, improving processability, reducing friction during extrusion or molding, and enhancing surface finish. In rubber production, it acts as a stabilizer and dispersing agent, promoting uniform mixing of fillers and preventing degradation. In cosmetics and personal care, calcium stearate is used as a thickening, emulsifying, and anti-caking agent in powders, creams, and lotions. It also finds applications in pharmaceuticals as a flow agent, tablet lubricant, and stabilizer in solid dosage forms. Additionally, it is employed in the production of coatings, adhesives, and paints to improve texture and durability.
Benefits
Calcium stearate offers multiple benefits due to its chemical stability, non-toxicity, and multifunctional properties. Its lubricating action reduces wear on processing equipment, enhancing efficiency and product quality. As a stabilizer, it protects polymers and rubber from thermal degradation and oxidation. Its hydrophobic nature improves water resistance in powders, coatings, and tablets, while its anti-caking properties prevent clumping and ensure consistent flow. Calcium stearate is compatible with a wide range of materials, easy to handle, and safe for use in food, cosmetic, and pharmaceutical applications, making it a cost-effective and reliable additive.
Conclusion
Calcium stearate is a widely used, multifunctional compound that enhances processing, stability, and performance in plastics, rubber, pharmaceuticals, and cosmetics. Its lubricating, stabilizing, and anti-caking properties, combined with chemical stability and safety, make it an essential additive in industrial and consumer products. By improving efficiency, product quality, and durability, calcium stearate remains a key component in a variety of manufacturing and formulation applications.
