5-Octanoylsalicylic acid/capryloyl salicylic acid is a skin conditioning agent that works by enhancing the appearance of dry/damaged skin, reducing dry patches/flaking and restoring suppleness to the skin. As an ester of salicylic acid (aka beta hydroxy acid or BHA), it's categorized as a BHA that works as an exfoliant, anti-inflammatory, and antiseptic. The skin care community regards it as an invaluable ingredient because of its multi-functional and versatile nature.
Because this ingredient requires very low concentrations to exfoliate dead skin cells, remove build-up inside the pores, condition the skin and calm inflamed skin, it is used in a variety of cosmetic products. You can find it in moisturizer, cleanser, astringent/toner, anti-aging treatment, shampoo/conditioner, acne cream, facial scrub and skin faders.