Sodium Bicarbonate, with the CAS number 144-55-8, has the molecular formula NaHCO₃ and a molecular weight of 84.01. Commonly known as baking soda, cooking soda, or bicarbonate of soda, it appears as fine white crystals. It is less soluble in water than sodium carbonate and exhibits weak alkalinity.

Medical Uses:Sodium bicarbonate has various medical applications. When taken orally, it quickly neutralizes stomach acid and is suitable for conditions such as hyperacidity, indigestion, and urine alkalinization. It is also used intravenously to treat acidosis. Externally, it can be used as ear drops to soften earwax, and a 2% solution can be used for sitz baths to treat fungal vaginitis.