Acting South Korean company for many years I UNID's KOH, liquid potassium hydroxide, potassium carbonate. UNID Korea is the world KOH (potassium hydroxide), K2CO3 (potassium carbonate) is the largest producer. Of which: production of ion exchange membrane KOH (potassium hydroxide) purity levels are: 90%, 95%; K2CO3 (potassium carbonate) content of 99.9%; liquid potassium hydroxide content: 48%