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Uses
Usnic acid is used as fragrance; preservative in deodorants; in anti ac ne formulations; antibiotic for topical application.
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Uses
(+)-Usnic acid has been used to study the following:
- The mechanism of its antimicrobial activity in bacterial cells.
- Its ability as an antibiofilm agent against Group A Streptococci (GAS).
- Its ability as a potent anti-virulent compound against Candida albicans.
- The mechanism of its toxic effect on hepatocytes.
- Its ability to inhibit the motility of human lung cancer cells.
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Uses
Usnic Acid acts as an antibacterial and antifungal agent, and are often seen used in cosmetics and facial application chemicals.
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General Description
This substance is a primary reference substance with assigned absolute purity (considering chromatographic purity, water, residual solvents, inorganic impurities). The exact value can be found on the certificate. Produced by PhytoLab GmbH & Co. KG
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Contact allergens
Usnic acid is a component of lichens, also used as a
topical antibiotic. Allergic contact dermatitis from
lichens occurs mainly occupationally in forestry and
horticultural workers, and in lichen pickers.
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Purification Methods
This very weak acid is the natural form which is recrystallised from Me2CO, MeOH or *C6H6. At 25o it is soluble in H2O (<0.01%), Me2CO (0.77%), EtOAc (0.88%), MeOCH2CH2OH (0.22%) and furfural (7.32%). [Curd & Robertson J Chem Soc 894 1937, Barton & Brunn J Chem Soc 603 1953, resolution: Dean et al. J Chem Soc 1250 1953, synthesis: Barton et al. J Chem Soc 538 1956, Beilstein 18/5 V 586.]
