Maintenance Notice (3:30 AM August 30 - 12:00 PM August 31, 2025 UTC): This website is scheduled to be unavailable due to maintenance.
During the period, there is case that you can access this website, but you would face errors. Please wait until notice of the maintenance completion. We appreciate your patience and understanding.
Maximum quantity allowed is 999
Please select the quantity
CAS RN: 7562-61-0 | Product Number: U0023
(+)-Usnic Acid
×
![]()
×
Purity: >98.0%(T)(HPLC)
Synonyms:
Product Documents:
| Size | Unit Price | Same Day | 2-3 Business Days | Other Lead Time |
Shipping Information
|
|---|---|---|---|---|---|
| 1G |
NT$798
|
9 | 0 | Contact Us | |
| 25G |
NT$8,568
|
9 | 0 | Contact Us |
* The above prices include freight cost, customs, and other charges to the destination except for products that need to be shipped by sea or dry ice. For details, please contact
our distributor
in Taiwan to order our product.
* The storage conditions are subject to change without notice.
| Product Number | U0023 |
Purity / Analysis Method 
|
>98.0%(T)(HPLC) |
| Molecular Formula / Molecular Weight | C__1__8H__1__6O__7 = 344.32 |
| Physical State (20 deg.C) | Solid |
| Storage Temperature
|
Room Temperature (Recommended in a cool and dark place, <15°C) |
| Packaging and Container
|
1G-Glass Bottle with Plastic Insert (View image) |
| CAS RN | 7562-61-0 |
| Reaxys Registry Number | 96698 |
| PubChem Substance ID | 87577753 |
| SDBS (AIST Spectral DB) | 7871 |
| Merck Index (14) | 9893 |
| MDL Number | MFCD00016878 |
Specifications
| Appearance | Light orange to Yellow to Green powder to crystal |
| Purity(HPLC) | min. 98.0 area% |
| Purity(Neutralization titration) | min. 98.0 % |
| Melting point | 195.0 to 203.0 °C |
| Specific rotation [a]20/D | +485 to +505 deg(C=0.7, CHCl3) |
| Solubility in Chloroform | almost transparency |
| NMR | confirm to structure |
Properties (reference)
| Melting Point | 200 °C |
| Specific Rotation | 495° (C=0.7,CHCl3) |
GHS
| Pictogram |
|
| Signal Word | Danger |
| Hazard Statements | H302 : Harmful if swallowed. H370 : Causes damage to organs. |
| Precautionary Statements | P501 : Dispose of contents/ container to an approved waste disposal plant. P260 : Do not breathe dust/ fume/ gas/ mist/ vapors/ spray. P270 : Do not eat, drink or smoke when using this product. P264 : Wash skin thoroughly after handling. P308 + P311 : IF exposed or concerned: Call a POISON CENTER/doctor. P301 + P312 + P330 : IF SWALLOWED: Call a POISON CENTER/doctor if you feel unwell. Rinse mouth. P405 : Store locked up. |
Related Laws:
| RTECS# | HP5295050 |
Transport Information:
| H.S.code* | 2932.99-000 |
Application
(+)-Usnic acid: A Lichen Metabolite with Antibiotic and Several Interesting Properties
(+)-Usnic acid is one of the most common and abundant lichen metabolites, and well known its antibiotic and several interesting properties.1,2) It is reported that the (+)-usnic acid is effective against a large variety Gram-positive bacterial stains including multi-resistant stains of Streptococcus aureus, enterococci and mycobacteria. (+)-Usnic acid also appears to be against Streptococcus mutans.
On the chemical structure, the absolute configuration of (+)-usnic acid at 9b position has determined by X-ray analysis to be R. 2,3,4) Of plausible tautomers, the low energy 1-oxo, 3-hydroxy confirmation is preferred according to calculations.1,2,3) The enolic 3-hydroxy group has the strongest acidic character (pKa 4.4) due to an inductive effect of the keto group.2) Recently, (+)-usnic acid derivatives are used as an organic ligand.5)
On the chemical structure, the absolute configuration of (+)-usnic acid at 9b position has determined by X-ray analysis to be R. 2,3,4) Of plausible tautomers, the low energy 1-oxo, 3-hydroxy confirmation is preferred according to calculations.1,2,3) The enolic 3-hydroxy group has the strongest acidic character (pKa 4.4) due to an inductive effect of the keto group.2) Recently, (+)-usnic acid derivatives are used as an organic ligand.5)
References
- Study of the cytotoxic and antimicrobial activities of usnic acid and derivatives
- E. R. Correche, M. Carrasco, M. E. Escudero, L. Velazquez, A. M. S. De Guzman, F. Giannini, R. D. Enriz, E. A. Jauregui, J. P. Cenal, O. S. Giordano, Fitoterapia 1998, 69, 493.
- Molecules of Interest usnic acid (a review)
- New Results on the Chemistry of Lichen Substances, 4.5.13. Usnic Acid and Related Compounds
- The absolute configurations of (+)-usnic and (+)-isousnic acid. X-ray analyses of the (－)-α-phenylethylamine derivative of (+)-usnic acid and of (－)-pseudoplacodiolic acid, a new dibenzofuran, from the lichen Rhizoplaca chrysoleuca.
- Novel chiral molecular tweezer from (+)-usnic acid
PubMed Literature
Documents
Product Articles
Product Documents (Note: Some products will not have analytical charts available.)
Safety Data Sheet (SDS)
Please select Language.
The requested SDS is not available.
Please Contact Us for more information.
Specifications
C of A & Other Certificates
Please enter Lot Number
Incorrect Lot Number. Please input only the 4-5 alphanumeric characters before the hyphen.
Sample C of A
This is a sample C of A and may not represent a recently manufactured lot of the product.
A sample C of A for this product is not available at this time.
Analytical Charts
Please enter Lot Number
Incorrect Lot Number. Please input only the 4-5 alphanumeric characters before the hyphen.
The requested analytical chart is not available. Sorry for the inconvenience.