Citric Acid[3][4] ●
TL;DR. This ingredient is used mainly as a pH adjuster and buffering agent, helping formulas land in a skin-appropriate acidity range. It can also support preservation systems by binding trace metal ions.
What does Citric Acid[3][4] do in a cosmetic formula?
This ingredient is used mainly as a pH adjuster and buffering agent, helping formulas land in a skin-appropriate acidity range. It can also support preservation systems by binding trace metal ions.
Is Citric Acid[3][4] clean?
It is widely accepted in clean-beauty standards and is generally well tolerated at typical pH-adjusting levels. Sensitivity is more likely in low-pH or higher-level exfoliating formulas, where stinging can occur on reactive skin.
Is Citric Acid[3][4] sustainable?
This material is commonly made by fermentation of sugar-based feedstocks, rather than petrochemical synthesis. It is readily biodegradable and has low environmental persistence, with the main footprint tied to agricultural inputs for the sugars used.
Is Citric Acid[3][4] COSMOS-approved?
It is permitted under COSMOS-natural and COSMOS-organic standards when it meets the standard’s sourcing and processing requirements. Its fermentation route, water compatibility, and ready biodegradability fit well with Green Chemistry principles.
How does Citric Acid[3][4] work chemically?
The molecule is a small, water-soluble tricarboxylic alpha-hydroxy compound with three acid dissociation steps, giving it useful buffering behavior around acidic pH ranges. Typical pH-adjusting use is often around 0.05% to 0.5%, with higher levels used only when the formula is intentionally acidic and designed for exfoliation.
Last updated 2026-05-15