Horseradish peroxidase (HRP) catalyzed H2O2-dependent oxidation and polymerization of p-aminophenylmethycarbinol (pAPMC), but not p-aminoacetophenone (pAAP) or other aniline derivative with electron-withdrawing character. The effect of the H2O2 feed ratio on the polymerization was examined. Chemical structure was determined by IR and H-1, C-13 NMR spectroscopic analysis. The p(pAMPC) formed primarily through a covalent bond between the benzilic carbons and the amino group of another pAPMC molecule. Thermal stability of p(pAPMC) was analyzed by DSC and TGA.