At NINGBO INNO PHARMCHEM CO.,LTD., we are dedicated to providing clear insights into the chemicals we supply. Stearic Acid, scientifically known as octadecanoic acid and identified by CAS 57-11-4, is a prime example of a chemical whose fundamental properties dictate its extensive industrial utility. Understanding its chemical nature is key to appreciating its diverse applications.

Stearic acid is a saturated fatty acid with an eighteen-carbon chain (C18H36O2). This long hydrocarbon chain makes it largely non-polar and hydrophobic, meaning it repels water but dissolves well in organic solvents and oils. The molecule also contains a carboxylic acid group (-COOH) at one end, which is polar and hydrophilic, giving it a dual nature. This amphiphilic character is the foundation for many of its uses, particularly as a surfactant and emulsifier.

Its melting point, typically around 69-72°C for industrial grades, makes it a solid at room temperature but easily meltable for processing. This property is leveraged in applications like candle making, where it solidifies wax. In plastics and rubber, it acts as an internal lubricant, reducing melt viscosity and friction within the material itself, and as an external lubricant, preventing sticking to machinery. These lubricating properties are derived from its long, waxy hydrocarbon chain.

The carboxylic acid group allows stearic acid to react with metals to form stearate salts (e.g., zinc stearate, calcium stearate). These metallic stearates are crucial as heat stabilizers in PVC processing, preventing thermal degradation. They also serve as mold release agents and lubricants in various industrial molding operations. The understanding of these stearic acid chemical properties and applications is vital for optimizing manufacturing processes.

As a surfactant, stearic acid lowers the surface tension of water, aiding in the cleaning industry for its ability to help lift and disperse grease and oil. This amphiphilic nature also makes it an effective emulsifier in cosmetic and food applications, helping to blend immiscible liquids like oil and water. For industries seeking reliable performance, the ability to buy stearic acid CAS 57-11-4 is paramount. NINGBO INNO PHARMCHEM CO.,LTD. ensures access to this essential chemical, enabling innovation and efficiency across a multitude of industrial sectors.