Aluminum Acetate

Aluminium acetate is an inorganic salt formed from aluminium and acetic acid. In skincare, it is typically produced by combining aluminium sulphate and calcium acetate in solution. This ingredient has been recognised by regulatory bodies including the FDA as safe and effective for topical use.

The ingredient functions primarily as an astringent and antimicrobial agent. Astringents work by causing a mild contraction of skin tissue, which can help reduce the appearance of pores and minimise excess surface moisture. The antimicrobial properties may also help reduce certain surface bacteria on the skin.

Aluminium acetate works through two primary mechanisms. As an astringent, it causes mild protein precipitation in the outer layers of skin, leading to a temporary tightening effect that can refine the appearance of pores and reduce visible oiliness.

Its antimicrobial action stems from the aluminium ions, which can inhibit the growth of certain bacteria on the skin surface. This dual action makes it particularly useful in products designed to manage oily skin or support skin prone to bacterial colonisation.

Aluminium acetate is typically found in toners, astringent solutions, and moisture-control serums. It is generally used once or twice daily, applied to clean skin with a cotton pad or as part of a formulated product. Since it can have a drying effect, those with sensitive or dry skin should introduce it gradually and consider using it in combination with hydrating or barrier-supporting ingredients.