Back to Ingredient Dictionary

SODIUM BISULFATE

Description

Sodium bisulfate, also known as sodium hydrogen sulfate, is a versatile chemical compound with applications in skincare and cosmetic formulations. This white, crystalline solid is derived from sulfuric acid and sodium chloride, resulting in a mildly acidic salt with a pH typically ranging from 1 to 2 in aqueous solutions.

In skincare products, sodium bisulfate primarily functions as a pH adjuster and buffering agent. Its ability to lower the pH of formulations makes it valuable for creating acidic environments necessary for certain active ingredients to perform optimally. This property is particularly useful in exfoliating products, where maintaining a low pH enhances the efficacy of alpha-hydroxy acids (AHAs) and beta-hydroxy acids (BHAs).

Sodium bisulfate also exhibits mild antimicrobial properties, contributing to product preservation. Its hygroscopic nature allows it to absorb moisture, which can be beneficial in certain formulations. However, due to its acidic nature, it must be used judiciously and at appropriate concentrations to avoid skin irritation.

When formulating with sodium bisulfate, it's crucial to consider its potential interactions with other ingredients and its impact on overall product stability. Proper pH testing and adjustment are essential to ensure product safety and effectiveness.