potassium hydroxide, is a chemical compound with formula KOH. Pure potassium hydroxide forms white, crystals. For commercial and laboratory use it is usually in the form of white pellets. A strong base, it dissolves readily in water, giving off much heat and forming a strongly alkaline, caustic solution. It is commonly called caustic potash. It closely resembles sodium hydroxide in its chemical properties and has similar uses, e.g., in making soap, in bleaching, and in manufacturing chemicals.
For soap making purposes, potassium hydroxide is used to make 'soft soaps'; if hard bars are required, use sodium hydroxide.
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