Aluminium stearate is an aluminium salt of stearic acid, known for its versatility and stability in industrial applications. With the chemical formula Al(C18H35O2)3, it appears as a fine, white powder that is insoluble in water but soluble in organic solvents such as benzene and chloroform. Its melting point typically ranges from 135°C to 170°C, making it suitable for various high-temperature processes.

The structure of aluminium stearate consists of aluminium ions coordinated with three stearate ions, forming a stable compound that is compatible with a wide range of materials. Its insolubility in water and solubility in organic solvents contribute to its effectiveness as a lubricant, stabilizer, and thickening agent in various applications.

Aluminium stearate is extensively used in the polymer industry as a lubricant and stabilizer. It enhances the processing of plastics, rubbers, and thermosetting resins by reducing friction and improving flow properties during molding and extrusion processes.

In cosmetics and personal care products, aluminium stearate serves as a thickening agent and emulsifier. It is commonly found in formulations such as lipsticks, lotions, and creams, where it contributes to the smooth texture and consistency of the final product.

Aluminium stearate acts as a lubricant and binder in pharmaceutical tablets and capsules. Its ability to improve the flow of powder blends and enhance tablet strength ensures uniformity and quality in dosage forms.

Due to its heat-resistant properties, aluminium stearate is used in fire-retardant materials. It helps reduce flammability by forming a protective barrier that inhibits the spread of flames, making it valuable in applications where fire safety is critical.

Aluminium stearate is utilized in paints and coatings as a water repellent and viscosity modifier. It improves the dispersion of pigments and enhances the overall performance of coatings by promoting adhesion and durability.