Also known as: BHA, Beta-Hydroxy Acid, 2-Hydroxybenzoic Acid
Salicylic acid is a beta-hydroxy acid (BHA) that is oil-soluble, allowing it to penetrate into pores and dissolve the sebum and dead skin cells that cause blackheads and whiteheads. It is keratolytic at higher concentrations and anti-inflammatory due to its structural similarity to aspirin. Effective at pH 3.0–4.0. The gold standard for acne-prone and congested skin.
Comedogenicity ratings are based on the rabbit ear assay model. Individual skin responses vary. See our article on comedogenicity ratings for context.
The Ingredient Journal
Every week we break down one ingredient in depth — the science, the claims, and what the label is not telling you.