Karubonate ya potasiyumu (K₂CO₃), mu mateka yakurwaga mu ivu ry'ibiti binyuze mu koza no gukamya mu nkono — ni ho izina ry'icyongereza «pot ash» rikomoka. Ni alkali iringaniye ikoreshwa nk'ikimenyesha mu gukora ikirahure, nka katalizatori mu gusiga ibara rya indigo, nk'igitera kuzamuka, no mu gukora isabune. Ishonga kurusha karubonate ya sodiyumu kandi itanga isabune yoroshye.