Salicylic Acid (from Latin salix, willow tree) is a lipophilic monohydroxybenzoic acid, a type of phenolic acid, and a beta hydroxy acid (BHA). It has the formula C7H6O3. This colorless crystalline organic acid is widely used in organic synthesis and functions as a plant hormone. It is derived from the metabolism of salicin. In addition to serving as an important active metabolite of aspirin (acetylsalicylic acid), which acts in part as a prodrug to salicylic acid, it is probably best known for its use as a key ingredient in topical anti-acne products. The salts and esters of salicylic acid are known as salicylates.
Ijaz, Khalid. “Virucidal Efficacy of PCMX and Salicylic Acid Microbicidal Actives against SARS-CoV-2 (COVID-19)”, 2020 Association for Professionals in Infection Control and Epidemiology, Inc. Published by Elsevier Inc.Control, 24 May 2020, https://www.ajicjournal.org/article/S0196-6553(20)30313-8/fulltext. 6 June 2020.