An abundant phenylpropane polymer found in all vascular plants.
Lignin acts as the "glue" for cellulose and hemicellulose constit uents of plants, and the three substances comprise the major cell
wall components of cellulosic plants, e.g., woody and grassy
plants. These substances are bound tightly and may only be sep arated under vigorous conditions. Lignin finds use as a drilling
fluid additive, asphalt emulsion stabilizer, protein precipitant, rub ber strengthener and precursor for the synthesis of phenol, vanillin
and other products.
