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The o-cymen-5-ol (C10H14O) is a substituted phenolic compound derivative of isopropyl cresol. It was first synthesized in 1954 as an isomer of thymol, and it is colourless, odourless, and has a high stability and a favourable safety profile. To date, several studies have shown that its use combined with zinc chloride prevents the proliferation of pathogenic bacteria and, therefore, the appearance of the aforementioned oral pathologies, halitosis, gingival bleeding, plaque formation and dental erosion[1].

[1] Javier Pascual. “A mouthwash formulated with o-cymen-5-ol and zinc chloride specifically targets potential pathogens without impairing the native oral microbiome in healthy individuals.” Journal of Oral Microbiology 15 1 (2023): 2185962.