Alkali is a chemical substance that can dissolve in water. They are alkaline in aqueous solution. Common alkalis include sodium hydroxide (NaOH), potassium hydroxide (KOH), etc. The main sales of alkali are in two states: solid and liquid. Alkali is mainly used in industrial production, food processing, cleaning agents, and regulating soil acidity and alkalinity. Alkali should be stored in a dry and well ventilated place, away from ignition sources and flammable materials. When using alkali, an appropriate amount should be used in accordance with the instructions and safety operating procedures to avoid excessive or misuse.