Aluminum Benzoate ●
TL;DR. This ingredient is used mainly as an antimicrobial preservative, with some astringent effect from its metal-salt character. It is most relevant in acidic formulas where its preservative system can perform effectively.
What does Aluminum Benzoate do in a cosmetic formula?
This ingredient is used mainly as an antimicrobial preservative, with some astringent effect from its metal-salt character. It is most relevant in acidic formulas where its preservative system can perform effectively.
Is Aluminum Benzoate clean?
From a clean-beauty perspective, this ingredient is acceptable but not especially friction-free because metal salts can draw more scrutiny than simpler organic-acid preservatives. Irritation potential is generally low at compliant levels, though acidic formulas can feel stingy on sensitive or compromised skin.
Is Aluminum Benzoate sustainable?
This material is typically made from mineral-derived metal chemistry and a synthetically produced aromatic acid, with no major palm or animal-sourcing issue. The organic portion is expected to biodegrade, while the metal ion does not biodegrade and returns to the inorganic mineral pool.
Is Aluminum Benzoate COSMOS-approved?
This ingredient can be permitted under COSMOS-natural and COSMOS-organic when it fits the allowed preservative-salt category and is used within legal concentration limits. Its Green Chemistry fit is moderate: low use levels help, but synthetic feedstocks and a nonrenewable metal component keep it from being a stronger match.
How does Aluminum Benzoate work chemically?
The molecule is a trivalent metal cation coordinated with aromatic carboxylate anions, so its behavior is closer to a sparingly soluble metal salt than to a highly water-soluble small preservative salt. Preservative performance depends on acidic conditions, commonly below about pH 5.5, and EU-style limits for this preservative family are expressed as the corresponding acid, often up to 0.5% in leave-on products.
Last updated 2026-08-29