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Lye can refer to two different chemicals. There is soda lye, which is sodium hydroxide, or NaOH, or potash lye, which is potassium hydroxide, or KOH.
It the VERY CAUSTIC OR BASIC (ALKALINE) - Meaning it can burn your skin, blind you, etc - Stuff found in Oven Cleaners, Draino, and other toilet bowl type stain removers. It used to be a minor ingredient in homemade soaps, way back when.
TREAT WITH CARE. READ THE INSTRUCTIONS. USE EYE AND SKIN PROTECTION, AND DON'T BREATHE THE VAPORS.

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17y ago
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6mo ago

Lye is a strong alkaline solution commonly used for cleaning and industrial purposes. It can be caustic and corrosive, so it should be handled with care. In food production, it is also used in the process of making soap and pretzels.

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11y ago

a strong alkali which is highly soluble in water to produce caustic basic solutions. It has many uses in both the household and in food. For example, one use is to brine olives.

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14y ago

Soda lye is sodium hydroxide or NaOH

as opposed to potash lye which is potassium hydroxide.

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Q: What is lye?
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