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USNIC ACID CAS:125-46-2

CAS: 125-46-2

MF: C18H16O7

MW: 344.32

EINECS: 204-740-7

Synonyms: (+-)-uanicacid;2,6-diacetyl-1,;2,6-diacetyl-1,2,3,9b-tetrahydro-7,9-dihydroxy-8,9b-dimethyldibenzofuran-1,3-dione;2,6-diacetyl-7,9-dihydroxy-8,9b-dimethyl-1,3(2h,9bh)-dibenzofurandione;Usnic acid, usinic acid;10 GM and 25 GM;Carbonusninic acid;2,6-diacetyl-7,9-dihydroxy-8,9b-diMethyldibenzo[b,d]furan-1,3(2H,9bH)-dione

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Description

USNIC ACID

USNIC ACID CAS:125-46-2

USNIC ACID Chemical Properties
Melting point 200°C
alpha D16 +509.4° (c = 0.697 in chloroform)
Boiling point 399.43°C (rough estimate)
density 1.2869 (rough estimate)
refractive index 495 ° (C=0.7, CHCl3)
storage temp. Inert atmosphere,2-8°C
pKa 4.00±0.40(Predicted)
Merck 9893
CAS DataBase Reference 125-46-2(CAS DataBase Reference)
EPA Substance Registry System Usnic acid (125-46-2)
USNIC ACID Usage And Synthesis
Chemical Properties Crystalline, yellow solid. Insoluble in water; slightly soluble in alcohol and ether.
Uses antibacterial
Uses Usnic acid is a major metabolite from a number of lichen and fungal species and is perhaps one of the longest known microbial metabolites, first isolated in 1844. Usnic acid exhibits a broad range of biological activity, indeed it is easier to list the bioassays in which it does not exhibit activity. More often than not, potency is low and of limited value. Usnic acid is an important metabolite for dereplication in discovery research programs.
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.
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.]

USNIC ACID CAS:125-46-2


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We can manufacture 3000+ kinds of water treatment chemicals, reagents&dyes.

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