Potassium hydroxide (KOH), otherwise known as caustic potash, is the largest-volume potassium chemical for non-fertilizer use. It is produced by the electrolysis of potassium chloride and is used in making soaps, detergents, potassium carbonate and other potassium chemicals. WARNING: Use protective mask, gloves, eye wear and clothing when using. Toxic and skin irritant. Use extreme caution and KEEP AWAY FROM CHILDREN!