Citric Acid ●
TL;DR. This ingredient is primarily used as a pH adjuster and buffering agent, helping formulas land in a skin-appropriate acidity range. It can also support preservation systems by lowering pH and lightly binding metal ions that can destabilize a formula.
What does Citric Acid do in a cosmetic formula?
This ingredient is primarily used as a pH adjuster and buffering agent, helping formulas land in a skin-appropriate acidity range. It can also support preservation systems by lowering pH and lightly binding metal ions that can destabilize a formula.
Is Citric Acid clean?
It is broadly accepted in clean-beauty frameworks and is generally well tolerated at normal formulation levels. Like many low-pH materials, it can sting on compromised skin or in exfoliating formulas where the overall product pH is intentionally low.
Is Citric Acid sustainable?
This ingredient is commonly produced by fermentation of sugar-based feedstocks and is readily biodegradable. Its sustainability profile is generally strong, with the main variables being agricultural inputs, energy use, and sourcing of the carbohydrate feedstock.
Is Citric Acid COSMOS-approved?
It is permitted under COSMOS-natural and COSMOS-organic standards when produced and used according to the standard. It aligns well with Green Chemistry principles because it can be fermentation-derived, biodegradable, multifunctional, and effective at low use levels.
How does Citric Acid work chemically?
The molecule is a small, water-soluble organic acid with three carboxyl groups and one hydroxyl group, giving it strong buffering and metal-chelating behavior across acidic pH ranges. Typical use is often around 0.05% to 2% for pH adjustment, with higher levels used only when the finished formula is designed around low-pH exfoliation or descaling performance.
Last updated 2026-05-13