Citric Acid[1][2][3] ●
TL;DR. This ingredient is primarily used to adjust and buffer pH, helping formulas reach a skin-appropriate acidity and supporting preservative performance. It can also provide mild chelation by binding metal ions that may affect stability.
What does Citric Acid[1][2][3] do in a cosmetic formula?
This ingredient is primarily used to adjust and buffer pH, helping formulas reach a skin-appropriate acidity and supporting preservative performance. It can also provide mild chelation by binding metal ions that may affect stability.
Is Citric Acid[1][2][3] clean?
From a clean-beauty perspective, this ingredient is widely accepted and generally well tolerated at normal pH-adjusting levels. Irritation is mainly a concentration and final-formula pH issue, especially in exfoliating or low-pH products.
Is Citric Acid[1][2][3] sustainable?
This material is commonly produced by fermentation of plant-derived sugars and is readily biodegradable. Its sustainability profile is generally favorable, with the main variables being feedstock sourcing and manufacturing energy use.
Is Citric Acid[1][2][3] COSMOS-approved?
It is permitted under COSMOS-natural and COSMOS-organic standards when used according to the standard’s ingredient and processing rules. It aligns well with Green Chemistry because it can be fermentation-derived, biodegradable, effective at low levels, and does not require persistent chemistry.
How does Citric Acid[1][2][3] work chemically?
The molecule is a small organic acid with three carboxyl groups and one hydroxyl group, which explains its strong pH-adjusting and metal-binding behavior. Typical use is often about 0.05% to 0.5% for pH adjustment, while stronger exfoliating systems may use more and must be controlled by final pH and buffering capacity.
Last updated 2026-05-13