MONOBENZONE MAY BE CONVERTED TO HYDROQUINONE WHICH THEY FOUND TO INHIBIT THE ENZYMATIC OF TYROSINE TO DOPA. MONOBENZONE ACTS AN ANTI-OXIDANT TO PREVENT SH-GROUP OXIDATION. IT IN SOME PATIENTS IT PRODUCES EXTENSIVE AND SELECTIVE DESTRUCTION OF MELANOCYTES. IT IS USED LOCALLY FOR FINAL, PERMANENT DEPIGMENTATION OF NORMAL SKIN IN EXTENSIVE VITILIGO.