Notes: Salicylic acid (Item No. 32991) is an analytical reference standard categorized as a COX inhibitor metabolite.{59754} Salicylic acid is a metabolite of aspirin. It has been found as an adulterant in seized heroin samples.{59755} It has also been found as an adulterant in milk used to increase shelf life.{59756} This product is intended for research and forensic applications.