Are there any alternatives to sodium hydroxide (lye) in making soap? - Quora

Answer (1 of 5): The earliest soaps were made using ashes of wood or other plants, which contains potash (potassium carbonate). You can also use potassium hydroxide. These will produce a softer soap, and in the case of KOH, liquid soap. Those are pretty much your only practical choices. Alkaline

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Are there any alternatives to sodium hydroxide (lye) in making soap? - Quora

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What should I do to make safe soap bar? I was ordered to make soap only from sunflower oil. At first it was jelly but when I used sodium lactate it hardened