CHEMICAL-PROPERTIES OF LIGNIN FROM ARALIA-CORDATA

Lignin from Aralia cordata, was isolated and characterized spectrometr ically and by chemical degradations. IR and C-13 NMR spectra of the di oxan lignin showed a pattern of guaiacyl (G)-syringyl (Sf lignin ester ified with p-hydroxybenzoate. Alkaline hydrolysis of the lignin gave p -hydroxybenzoic acid. Molar ratios of the main syringyl to guaiacyl mo nomers recovered from alkaline nitrobenzene oxidation and from thioaci dolysis are 1.3 and 1.2, respectively, indicating that A. cordata cont ains a guaiacyl-syringyl lignin, although the amount of syringyl ligni n is a little lower than that in normal angiosperm wood.