Sodium Stearate is a well-known organic compound, primarily recognized as the sodium salt of stearic acid. It typically presents as a white to slightly yellow powder or solid block. This compound is fundamentally a metal soap, valued across numerous industries for its unique chemical properties.

Chemically, Sodium Stearate has the formula NaC18H35O2. Its physical characteristics include a density of approximately 1.48 g/cm³. It decomposes when heated, with a melting point generally ranging between 200°C and 220°C. While largely insoluble in cold water, it disperses effectively in hot water and shows partial solubility in specific organic solvents such as ethanol and glycerol. A 1% solution in water typically exhibits a slightly acidic pH, usually between 3.5 and 5.0. Its stability is moderate; it decomposes in water and releases SO2 gas when reacted with acid, although this specific property mentioned in some older texts might relate to misidentification with other compounds; Sodium Stearate's primary reaction with acid involves generating stearic acid and a sodium salt of the acid.

The versatility of Sodium Stearate stems from its functionality as an excellent emulsifying agent, lubricant, and stabilizer. These properties make it an indispensable ingredient in a wide array of products.

One of the most significant applications of Sodium Stearate is in the cosmetics and personal care industry. It is a primary component in solid stick deodorants and antiperspirants, acting as a gelling agent to create their solid structure. In soaps and cleansers, it functions as a surfactant, helping to mix oil and water and facilitating the removal of dirt. It also serves as an emulsifier and thickener in various lotions, creams, and cosmetic formulations, contributing to product texture and stability.

The plastics industry heavily utilizes Sodium Stearate as a lubricant and mold-release agent. Incorporating it into plastic processing, particularly for polymers like PVC and ABS, helps to reduce friction during extrusion and molding. This results in smoother production, lower energy consumption, and easier release of finished products from molds, improving overall efficiency and product quality.

In the food industry, Sodium Stearate is approved for certain uses as an anti-caking agent (often listed as E470a or E470b depending on the metal cation, though Sodium Stearate is specifically E470a) or as an emulsifier. It helps prevent powders from clumping together and can aid in stabilizing mixtures of ingredients that would otherwise separate. Its use in food is carefully regulated to ensure safety and compliance with standards.

Sodium Stearate also finds application in the pharmaceutical sector. Here, it can serve as a lubricant in tablet manufacturing, preventing ingredients from sticking to pressing machinery. It may also be used as a component in ointment bases or other topical formulations.

Beyond these major uses, Sodium Stearate is employed in other niche applications, including as a component in metal polishing compounds and as an additive in textile processing, sometimes contributing to waterproofing properties.

The demand for high-quality Sodium Stearate continues to grow across these diverse markets. Sourcing a reliable supply of this essential raw material is crucial for manufacturers. NINGBO INNO PHARMCHEM CO.,LTD. is a dedicated manufacturer and supplier of chemical raw materials, offering Sodium Stearate powder suitable for these various industrial and technical applications. For those looking to buy or purchase Sodium Stearate, understanding the product's specifications and potential uses is key. We provide detailed information and competitive price options for bulk orders, ensuring clients receive materials that meet their specific requirements.