Benzoic Acid ●
TL;DR. This ingredient is primarily used as a preservative, especially against yeast and mold, and it performs best in acidic formulas. It can also contribute modest pH adjustment in some systems.
What does Benzoic Acid do in a cosmetic formula?
This ingredient is primarily used as a preservative, especially against yeast and mold, and it performs best in acidic formulas. It can also contribute modest pH adjustment in some systems.
Is Benzoic Acid clean?
From a clean-beauty perspective, this ingredient is generally accepted and widely used at regulated levels. It can be sensitizing or irritating for some users at higher exposure or in very acidic formulas, so concentration and finished-product pH matter.
Is Benzoic Acid sustainable?
This material can be made from petroleum-derived or nature-identical routes, and it also occurs naturally in some plants. It is generally considered readily biodegradable and is not known for high environmental persistence in rinse-off use patterns.
Is Benzoic Acid COSMOS-approved?
It is permitted under COSMOS standards as an approved preservative when used within allowed limits. Its profile fits several Green Chemistry preferences, including high functional efficiency at low levels and good biodegradability, though common industrial production is not always based on renewable feedstock.
How does Benzoic Acid work chemically?
The molecule is a small aromatic carboxylic acid whose antimicrobial activity depends on the undissociated form, so efficacy is strongest below about pH 5 and declines as pH rises. In cosmetics, regional limits are commonly expressed as acid-equivalent concentration, with EU maximums of 0.5% in leave-on products, 2.5% in most rinse-off products, and 1.7% in oral-care products.
Last updated 2026-05-13