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1.Natural organic usnic acid sodium
2.Favorable price,high quality
3.Bulk stock, prompt delivery
4.Purity 1% -99%
More Information of Usnic Acid Sodium
Product Description
1. Usnic Acid & Usnic Acid Sodium (GL-UA)
2. CAS Number: 125-46-2. Synonym: 2, 6- diacetyl- 1, 2, 3, 9b- tetrahydro- 7, 9- dihydroxy- 8, 9b- dimethyldibenzofuran- 1, 3- dione
4. Origin: Usnea
5. Molecular Formula: C18H16O7
6. Molecular Weight: 344.32
7. Appearance: Yellow crystalline substance
8. Purity by HPLC: Minimum 98%
9. Solubility: Clear colorless solution at 0.1Mg/Ml in cool water
10.Test Item: Appearance, Solubility, Loss on drying, Ash, Assay, Solvent Residual, Pesticide Residual, Heavy Metals, Microbiological.
11. Usnic acid is extracted from Usnea, Usnea, also known as old man's beard, is not a plant but a lichen_a symbiotic relationship between an algae and a fungus. The entire lichen is used medicinally. Usnea looks like long, fuzzy strings hanging from trees in the forests.
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. |
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.] |
Definition |
ChEBI: A member of the class of dibenzofurans that is dibenzo[b,d]furan-1(9bH)-one substituted by acetyl groups at positions 2 and 6, hydroxy groups at positions 3 and 7 and methyl groups at positions 8 and 9b. |
InChI:InChI=1/C18H16O7/c1-6-14(22)12(8(3)20)16-13(15(6)23)18(4)10(25-16)5-9(21)11(7(2)19)17(18)24/h5,21-23H,1-4H3/t18-/m0/s1
usnic acid
Conditions | Yield |
---|---|
(-)-Usninsaeure, sd. Xylol;
|
|
(+)-Usninsaeure, sd. Xylol;
|
usnic acid
p-tolylhydrazine hydrochloride
8-acetyl-5,7-dihydroxy-3,4a,6-trimethyl-1-(p-tolyl)-1,4a-dihydro-4H-benzofuro[3,2-f]indazol-4-one
Conditions | Yield |
---|---|
With pyridine; In ethanol; for 16h; Reflux; Inert atmosphere;
|
47% |
8-acetyl-5,7-dihydroxy-3,4a,6-trimethyl-1-phenyl-1,4a-dihydro-4H-benzofuro[3,2-f]indazol-4-one
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