Citric Acid[1] ●
TL;DR. This ingredient is primarily a pH adjuster and buffering acid, used to bring formulas into a skin-appropriate range. It can also support preservative performance and help bind trace metal ions that can destabilize a formula.
What does Citric Acid[1] do in a cosmetic formula?
This ingredient is primarily a pH adjuster and buffering acid, used to bring formulas into a skin-appropriate range. It can also support preservative performance and help bind trace metal ions that can destabilize a formula.
Is Citric Acid[1] clean?
From a clean-beauty perspective, this ingredient is well accepted and generally low concern when used at normal formulation levels. It can sting or irritate at higher levels or in very low-pH products, especially on compromised skin.
Is Citric Acid[1] sustainable?
This material 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, fermentation efficiency, and wastewater management.
Is Citric Acid[1] COSMOS-approved?
It is permitted under COSMOS-natural and COSMOS-organic standards when it meets the standard’s sourcing and processing requirements. It fits Green Chemistry well because it is typically fermentation-derived, water-soluble, biodegradable, and effective at low use levels.
How does Citric Acid[1] work chemically?
The molecule is a small, water-soluble alpha-hydroxy tricarboxylic acid with three acid dissociation steps, giving useful buffering behavior across roughly pH 3 to 6. In personal care, it is often used around 0.05% to 0.5% for pH adjustment, with higher levels possible in acid-focused formulas where total acidity and final pH drive tolerability.
Last updated 2026-05-13