Salicylic acid is a beta hydroxy acid used widely in skincare. Because it is oil soluble, it penetrates into pores and dissolves the mix of oil and dead cells that forms blackheads and congestion, making it a staple for acne prone and oily skin.
In Australia it appears in cleansers, serums and spot treatments at strengths up to 2 percent over the counter. It pairs well with benzoyl peroxide or retinoids in a routine, though introducing actives gradually prevents irritation. Stubborn congestion may need prescription strength alternatives.