KOH is produced by electrolysis of potassium chloride, or by boiling a solution of potassium carbonate (potash) with calcium hydroxide (slaked lime). The process leads to a metathesis reaction that results in calcium carbonate. When it precipitates, it leaves potassium hydroxide in solution. KOH forms a strong alkaline solution when dissolved in water or alcohol. It has almost the same properties as NaOH.

Potassium hydroxide (also called caustic potash, potash lye, or potassium hydrate) is a caustic metallic base with high conductivity range. KOH is used in many industries, including companies specialized in the refinement of petroleum and natural gas. Within these industries, it is used to remove organic acids and sulphur compounds. It is also used in the production of biodiesel and soft soaps.

Rhosonics has developed very accurate analysers for this application: Model 8500 and Model 9680. Both ultrasonic analysers measure the velocity of sound with a high degree of accuracy, in line and in real time. By measuring the speed of sound, the actual concentration can be determined in a wide concentration and temperature range. Model 9680 has additional features: it can also measure the density and amount of solids.

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