TMZ hydrolyseres spontant ved fysiologisk pH primært til det aktive stof, 3- methyl - (triazen- 1 - yl) imidazol- 4- carboxamid (MTIC).
TMZ is spontaneously hydrolyzed at physiologic pH primarily to the active species, 3-methyl-(triazen- 1-yl)imidazole-4-carboxamide (MTIC).