It is found under the names hydroxy-2 benzoic acid and beta-hydroxy acid. It is the product of a natural synthesis in certain plants, but reproduced in laboratories for its use in medicine and cosmetology.
It helps skin exfoliation by preventing pore obstruction. It penetrates the skin and increases collagen production. It is more exfoliating and less irritating than AHAs. In medicine, it is used for the treatment of acne since it has an anti-inflammatory and antibacterial effect.