Zinc Stearate as an Absorbent in Personal Care Products

Zinc Stearate as an Absorbent in Personal Care Products

In PVC (polyvinyl chloride) formulations, zinc stearate acts as a thermal stabilizer. It helps prevent the degradation of PVC during high-temperature processing, such as extrusion or molding. By inhibiting heat-induced reactions and maintaining PVC's molecular structure, zinc stearate ensures the longevity and performance of PVC-based products, including pipes, cables, and profiles.

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Dongguan Hanwei Technology Co., Ltd. is a high-tech enterprise integrating R&D, production and sales. Its products are mainly used in petrochemical, rubber and plastics, coatings, papermaking and other fields. The main products are zinc stearate , calcium stearate , magnesium stearate , other fatty acid salts, fatty acid esters, water-based zinc stearate, water-based calcium stearate, wood-plastic lubricants, PE wax, wax emulsion and Various rubber additives, etc.

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Role in the Pharmaceutical Industry

Zinc stearate also plays a significant role in the pharmaceutical industry. It is commonly used as a glidant and lubricant in tablet manufacturing. Zinc stearate facilitates the flow of powdered ingredients, ensuring uniform tablet weight and preventing sticking to the machinery. Moreover, it enhances the dissolution rate of tablets, improving their bioavailability.

Chemical Composition and Structure

Zinc stearate is chemically composed of zinc ions (Zn2+) and stearate ions (C18H35O2-). It has a molecular formula of Zn(C18H35O2)2 and a molar mass of approximately 632.3 g/mol. Structurally, it forms a crystalline lattice with the zinc ions surrounded by stearate ions. Understanding its chemical composition and structure provides insights into its properties and applications.

Physical Properties

Zinc stearate has several notable physical properties. It is a fine, fluffy powder with a density of around 1.1-1.2 g/cm3. It is insoluble in water but dissolves in most organic solvents. The melting point of zinc stearate is approximately 120-130°C, and it decomposes upon further heating. These physical properties make zinc stearate suitable for various processing techniques and applications.

Application in Cosmetics and Personal Care Products

Due to its excellent binding and emulsifying properties, zinc stearate is widely used in cosmetics and personal care products. It serves as a bulking agent in powders, preventing clumping and providing a smooth texture. Zinc stearate is also utilized as a thickening agent in creams, lotions, and makeup products, enhancing their stability and spreadability.

Frequently Asked Question

Do you have any question?

Yes, zinc stearate can be used in food packaging materials. It is considered safe for indirect food contact applications and is commonly used as a release agent or anti-caking agent in food packaging processes.

Zinc stearate is generally considered to be environmentally friendly. It is biodegradable and does not persist in the environment. Additionally, its non-toxic nature and low risk of bioaccumulation make it a preferred choice over certain alternative additives in many applications.

Its primary function is to provide specific technical properties rather than serve as a significant source of dietary zinc.

Zinc stearate is considered safe for use in cosmetics and personal care products. It has a long history of use and is generally recognized as safe by regulatory authorities.

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