National Toxicology Program

National Toxicology Program

Testing Status of Usnic acid - M050042


CASRN: 125-46-2

Formula: C18-H16-O7

Synonyms/Common Names

  • 2,6-Diacetyl-7,9-dihydroxy-8,9b-dimethyl-1,3(2H,9bh)-dibenzofurandione

Known Uses

Preservative, active ingredient in medicinal products, marketed as a dietary supplement to promote weight loss

Chemical Properties

Toxicity Effects (HSDB)

Nomination Background

Genetic Toxicology

  • Salmonella  (A93914)  Completed 
    •  Negative 
NTP is located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.