Carnosic acid

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Carnosic acid
Chemical structure of carnosic acid
CAS number 3650-09-7 YesY
PubChem 65126
ChemSpider 58635 N
Jmol-3D images Image 1
Molecular formula C20H28O4
Molar mass 332.43 g mol−1
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
Infobox references

Carnosic acid is a natural benzenediol abietane diterpene found in rosemary (Rosmarinus officinalis) and common sage (Salvia officinalis).[1] Dried leaves of rosemary or sage contain 1.5 to 2.5% carnosic acid.

Carnosic acid is an antioxidant[citation needed] and protects skin cells against UV-A radiation (photoprotection).[medical citation needed] Studies in animals have also found a protection against carcinogens.[medical citation needed]

Carnosic acid is used as a preservative or antioxidant in food and nonfood products (e.g. toothpaste, mouthwash and chewing gum -in which it has an antimicrobial effect on the microbes responsible for bad breath- or skin care products).[citation needed]


  1. ^ Schwarz, Karin; Ternes, Waldemar (1992). "Antioxidative constituents of Rosmarinus officinalis and Salvia officinalis". Zeitschrift für Lebensmittel-Untersuchung und -Forschung 195: 99–103. doi:10.1007/BF01201766.