Aluminum PCA is a salt formed by combining aluminum with pyrrolidone carboxylic acid (PCA), a derivative of the amino acid proline. This ingredient is commonly used in personal care and cosmetic products for its antiperspirant, moisturizing, and skin-conditioning properties. Aluminum PCA helps control sweat and odor while maintaining the skin’s hydration, making it a popular choice in deodorants, antiperspirants, and skincare formulations for oily or acne-prone skin.
Chemical Composition and Structure
Aluminum PCA is a compound where aluminum ions are bonded with PCA, an amino acid derivative known for its moisturizing and skin-conditioning properties. PCA is a naturally occurring substance in the skin that plays a role in maintaining hydration, while aluminum ions are responsible for reducing sweat and controlling odor. The combination provides both antiperspirant and skin-conditioning benefits.
Physical Properties
Aluminum PCA typically appears as a white powder or crystalline solid that is water-soluble, making it easy to incorporate into a variety of formulations. It is stable under normal conditions and helps reduce sweat production by forming a temporary plug in sweat ducts, while the PCA component helps condition and hydrate the skin.
Production Process
The production of Aluminum PCA involves the reaction of aluminum salts with pyrrolidone carboxylic acid (PCA). The resulting compound is purified and dried to produce a high-quality ingredient suitable for use in personal care and cosmetic products.
Applications
Antiperspirants and Deodorants: Aluminum PCA is primarily used in deodorants and antiperspirants for its ability to reduce sweat and control odor while maintaining the skin’s hydration, making it less harsh than traditional aluminum-based antiperspirants.
Skincare for Oily and Acne-Prone Skin: Due to its moisture-binding properties, it is also found in skincare products for oily and acne-prone skin, where it helps balance hydration and reduce excess oil.
Moisturizers: In some skincare formulations, Aluminum PCA is used for its hydrating and skin-conditioning properties, as PCA is a natural moisturizing factor that helps maintain skin hydration.
Haircare Products: It may also be used in haircare products for its ability to help regulate moisture and improve the condition of the scalp.
Cosmetics
Cosmetic astringent. This ingredient exerts a direct effect on the skin by tightening dilated pores by contracting stratum corneum cells and removing superfluous oil.
Skin conditioning agent. It is the mainstay of topical skin treatment by restoring, increasing or improving skin tolerance to external factors, including melanocyte tolerance. The most important function of the conditioning agent is to prevent skin dehydration, but the subject is rather complex and involves emollients and humectants.
EC number 261-931-8
CAS: 59792-81-3
Safety
Careful consideration should be given to the risk of cumulative aluminum intake, which cannot be ruled out because this ingredient can be found in both cosmetic products and widely consumed food products such as bread, various baked goods (1).
