Back to Ingredient Dictionary

Citrate Buffer

Description

Citrate buffer is a crucial component in many skincare formulations, playing a vital role in maintaining product stability and efficacy. This versatile ingredient is composed of citric acid and its conjugate base, typically sodium citrate. Its primary function is to regulate and stabilize the pH of cosmetic products, ensuring they remain within the optimal range for skin health and ingredient performance.

Citrate buffer's effectiveness stems from its ability to resist pH changes when small amounts of acids or bases are added to a solution. This buffering capacity is essential in skincare, as it helps maintain product consistency and prevents potential irritation caused by pH fluctuations. Additionally, citrate buffer enhances the preservation of formulations by creating an environment less conducive to microbial growth.

Beyond pH regulation, citrate buffer offers chelating properties, which can improve product stability by binding to metal ions that might otherwise catalyze oxidation reactions. This characteristic is particularly beneficial in formulations containing antioxidants or other sensitive ingredients. Citrate buffer also contributes to the overall sensory experience of skincare products, often imparting a smooth, pleasant texture. Its gentle nature makes it suitable for a wide range of skin types, including sensitive skin.