Product Introduction
Sodium L-pyroglutamate, also known as Sodium PCA, is the sodium salt of pyroglutamic acid, a naturally occurring amino acid derivative. It functions primarily as a humectant. Sodium PCA helps to attract and retain moisture in skin and hair. It is non-toxic, non-irritating, and odorless, making it suitable for a wide variety of personal care applications. Sodium PCA is also biodegradable.
[Source: Draelos, Z. D. (2018). Cosmetic Dermatology: Products and Procedures. John Wiley & Sons.]
Production Process
Sodium L-pyroglutamate can be synthesized through several methods. One common method involves the cyclization of L-glutamic acid at high temperatures, this process removes a molecule of water to form pyroglutamic acid. The pyroglutamic acid is then neutralized with a sodium base, such as sodium hydroxide. Finally, the solution undergoes crystallization, filtration, and drying steps to obtain the pure Sodium L-pyroglutamate powder. Modern production often employs enzymatic conversion, which can offer higher yields and better stereochemical control.
[Source: Vijayakumar, V., &рованным Rao, K. S. (2007). Production, properties and applications of L-glutamic acid. Comprehensive Reviews in Food Science and Food Safety, 6(4), 73-86.]
Effects and Functions
Sodium L-pyroglutamate is known for its moisturizing capabilities. It is a component of the skin's natural moisturizing factor (NMF). Sodium PCA enhances the skin's ability to retain water, which helps maintain skin elasticity and suppleness. It reduces trans-epidermal water loss (TEWL), keeping the skin hydrated. In hair care products, it acts as a humectant to improve hair's moisture retention, softness, and manageability.
[Source: Proksch, E., Brandner, J. M., & Jensen, J. M. (2008). The skin: an indispensable barrier. Experimental Dermatology, 17(12), 1063-1072.]
Application Scenarios
In cosmetics, Sodium L-pyroglutamate is used in creams, lotions, serums, and facial cleansers for its moisturizing properties. It can be found in hair conditioners, shampoos, and styling products to improve hair hydration and reduce static. In pharmaceuticals, it can serve as a solubilizing agent and humectant in topical medications. Sodium PCA is also used in some food applications as a flavor enhancer.
[Source: Lodén, M., & Wessman, W. (2001). The influence of a cream containing 20% urea and 4% NMF (natural moisturizing factor) on dry, eczematous skin. Skin Research and Technology, 7(1), 19-23.]
Packaging and Storage
Sodium L-pyroglutamate should be packaged in airtight containers to protect it from moisture and contamination. It is recommended to store it in a cool, dry place, away from direct sunlight and extreme temperatures. Under proper storage conditions, the product can maintain its stability and quality for up to two years.
[Source: Ash, M., & Ash, I. (2004). Handbook of Preservatives. Synapse Information Resources.]
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