The Introduction Of Borneol

Borneol, also known as card brain, orange slices, wormwood slices, borneol, borneol, plum blossom borneol, karma, plum brain, borneol, plum ice, etc., is obtained from the stem leaves of the asteraceae or the camphor tree branches and leaves by steam distillation and recrystallized.
The chemical composition is a terpene, the molecular formula is C10H18O, also known as bornol or 2-camphorol. White translucent hexagonal crystals, smelling like camphor. Dextrobornol is a foliate or hexagonal flake crystal. Melting point 208℃, boiling point 212℃, relative density 1.011 (20/4℃), specific rotation +37.7 (ethanol); Soluble in ethanol, ether and benzene. L-borneol is a hexagonal flake crystal. The melting point is 208.6℃, the boiling point is 210℃ (779 mm Hg), and the relative density is 1.1011 (20/4℃). Soluble in ethanol, ether, acetone and benzene. Racemic bornol is foliated crystal; Melting point 210.5℃, easy sublimation, relative density 1.011 (20/4℃); Soluble in ethanol, ether and benzene. When oxidized, camphor is formed. Borneol can be reduced from camphor with sodium metal in ethanol solution. Or it is prepared by esterification of pinene with oxalate and hydrolysis in the presence of catalyst. Borneol is widely used in the preparation of rosemary, lavender flavor, and used in traditional Chinese medicine and Chinese ink.
There are three main types of borneol:
1, synthetic borneol (commonly known as synthetic borneol)
【CASNO.】507-70-0
[Source] It is produced from turpentine through a series of chemical synthesis processes.
[Properties] Colorless translucent or white translucent brittle crystal, volatile, ignite smoke, and have a flame with light.
2, natural borneol L-borneol (to show the difference in the pharmacopoeia is also called "wormwood")
【CASNO.】464-45-9
[Source] It was obtained from the fresh stems and leaves of blumeabalsamifera(L.)Dc., a compositaceae plant mainly produced in Guizhou Province, by steam distillation and recrystallization.
[Properties] White semi-bright flake, block or granular crystal. Volatile, black smoke when ignited, yellow flame, no residue left.
3. Dextrobornol of natural borneol
【CASNO.】464-43-7
【 Source 】 Cinnamomumcamphora(L.)presl), a plant of the camphaceae family, was extracted and processed.
[Properties] White crystalline powder or flake crystal. Volatile, heavy smoke when ignited, yellow flame.