Lye
（重定向自Alkaline liquor）
![Pellets of sodium hydroxide.](/Images/godic/202412/18/SodiumHydroxide2222.jpg")
![Bottles of alkaline drain cleaners containing lye.](/Images/godic/202412/18/NaOH_-_drain-cleaner2222.jpg")
A lye is a liquid obtained by leaching ashes (containing largely potassium carbonate or "potash"), or a strong alkali which is highly soluble in water producing caustic basic solutions. "Lye" is commonly the alternative name of sodium hydroxide (NaOH) or historically potassium hydroxide (KOH).