Citric Acid[2][3] ●
TL;DR. This ingredient is used mainly as a pH adjuster and buffering aid, helping formulas land in the right acidity range for stability, preservation, and skin feel. It can also lightly chelate metal ions, which supports formula clarity and oxidative stability.
What does Citric Acid[2][3] do in a cosmetic formula?
This ingredient is used mainly as a pH adjuster and buffering aid, helping formulas land in the right acidity range for stability, preservation, and skin feel. It can also lightly chelate metal ions, which supports formula clarity and oxidative stability.
Is Citric Acid[2][3] clean?
Clean-beauty frameworks generally view this ingredient as well-tolerated and unproblematic. At low formula pH or higher levels, it can sting or increase irritation potential, especially in leave-on exfoliating products.
Is Citric Acid[2][3] sustainable?
This ingredient is commonly made by fermentation of plant-derived sugars and is readily biodegradable. Its sustainability profile is generally strong, with the main variables being agricultural feedstock sourcing and fermentation inputs.
Is Citric Acid[2][3] COSMOS-approved?
It is permitted under COSMOS-natural and COSMOS-organic standards when it meets the standard’s sourcing and processing requirements. It aligns well with Green Chemistry because it can be fermentation-derived, biodegradable, and useful at low levels for pH control.
How does Citric Acid[2][3] work chemically?
The molecule is a small tricarboxylic alpha-hydroxy acid with strong water solubility and useful buffering behavior in mildly acidic systems. Typical use is about 0.05% to 0.5% for pH adjustment, with higher levels possible in acid-focused formulas where final pH and irritation potential need tighter control.
Last updated 2026-05-16