Stearic Acid, scientifically known as Octadecanoic Acid (CAS 57-11-4), is a saturated fatty acid that forms a fundamental building block in various industrial and consumer products. Its unique chemical structure and physical properties lend themselves to a wide array of applications, from plastics and rubber to cosmetics and pharmaceuticals. Understanding the core aspects of Stearic Acid – its properties, production, and safety – is crucial for manufacturers and formulators. NINGBO INNO PHARMCHEM CO.,LTD., a prominent supplier of stearic acid China, ensures the delivery of high-quality product that meets rigorous standards.

Chemically, Stearic Acid is an 18-carbon saturated fatty acid with the formula C18H36O2. At room temperature, it typically appears as a white, waxy solid, often found in flake or bead form. Its melting point ranges between 50-60°C (though pure stearic acid melts around 69.6°C), and it is insoluble in water but soluble in organic solvents like ethanol and acetone. These physical characteristics are key to its functionality in various formulations, particularly in providing texture, lubrication, and stability.

The production of Stearic Acid primarily involves the hydrolysis of animal fats and vegetable oils, followed by hydrogenation and fractionation. Animal fats, such as tallow, and vegetable oils, particularly palm oil, are rich sources of triglycerides, which are esters of glycerol and fatty acids, including stearic and palmitic acids. Hydrolysis breaks these triglycerides down into glycerol and free fatty acids. Hydrogenation converts any unsaturated fatty acids (like oleic acid) into saturated ones, increasing the melting point and stability of the resulting product. Fractionation then separates the mixture to yield a higher concentration of stearic acid. Many manufacturers focus on producing specific grades, such as triple-pressed stearic acid, to achieve desired purity levels for different applications. Sourcing and processing methods significantly influence the quality and suitability of Stearic Acid for specific uses, underscoring the importance of reliable suppliers when you aim to buy stearic acid CAS 57-11-4.

Safety is a paramount consideration for any chemical used in consumer products. Stearic Acid is generally recognized as safe (GRAS) by regulatory bodies for use in food, cosmetics, and pharmaceuticals. Its low toxicity profile makes it suitable for direct human contact applications. Manufacturers adhere to strict quality control measures to ensure purity and absence of contaminants. However, as with any chemical, appropriate handling procedures, including the use of personal protective equipment, should be followed during industrial processing to avoid inhalation of dust or prolonged skin contact, although it is considered non-irritating for most.

The widespread applicability of Stearic Acid stems from its unique properties. In plastics, it acts as a lubricant, mold release agent, and stabilizer. In rubber, it serves as a vulcanization activator and softener. In cosmetics, it functions as an emollient, thickener, and emulsifier. It is also used in the production of candles, soaps, lubricants, and as a component in various chemical intermediates. The versatility and reliability of Stearic Acid make it a staple in numerous manufacturing sectors worldwide.

In conclusion, Stearic Acid is a fundamental chemical with a broad spectrum of uses, underpinned by its favorable physical and chemical properties, its natural origin, and its safety profile. For businesses relying on this critical compound, partnering with experienced and quality-conscious suppliers like NINGBO INNO PHARMCHEM CO.,LTD. is essential to ensure the integrity and performance of their final products.