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(+)-Usniacin

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(+)-Usniacin Basic information
(+)-Usniacin Chemical Properties
  • Melting point:201-203 °C(lit.)
  • alpha 488 º (c=0.4, CHCl3)
  • Boiling point:399.43°C (rough estimate)
  • Density 1.2869 (rough estimate)
  • refractive index 1.4790 (estimate)
  • storage temp. 2-8°C
  • pka4.00±0.40(Predicted)
  • optical activity[α]25/D +488°, c = 0.7% in chloroform
  • Water Solubility Partly soluble in water. Soluble in acetone, ethanol, chloroform and furfural.
  • Merck 14,9893
  • BRN 96698
  • CAS DataBase Reference7562-61-0(CAS DataBase Reference)
Safety Information
  • Hazard Codes Xn
  • Risk Statements 22
  • Safety Statements 36
  • WGK Germany 3
  • RTECS HP5295050
  • 3-10
  • HazardClass IRRITANT
  • HS Code 29329990
MSDS
(+)-Usniacin Usage And Synthesis
  • Contact allergensUsnic 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 MethodsThis 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.]
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