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Sodium bicarbonate
**Sodium bicarbonate** (NaHCO₃), commonly known as **baking soda**, is a white crystalline powder, weakly alkaline. It is widely used in the **food industry** (leavening agent), **medicine** (antacid), **firefighting** (dry powder fire extinguisher) and **cleaning products**. It is easily decomposed by heating (2NaHCO₃→Na₂CO₃+H₂O+CO₂↑), and is an important multifunctional chemical.
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