sodium bicarbonate

noun

: a white crystalline weakly alkaline salt NaHCO₃ used especially in baking powders and fire extinguishers and in medicine as an antacid

called also baking soda, bicarbonate of soda

Examples of sodium bicarbonate in a Sentence

Recent Examples on the Web

At the outlet of the anode, the carbon dioxide produced by the reaction is captured directly on-site and then either catalytically transformed into useful chemical feedstocks such as synthesis gas or chemically stabilized into compounds like sodium bicarbonate. —Bojan Stojkovski, Interesting Engineering, 26 Apr. 2026

Baking soda, or sodium bicarbonate, is a salt that can be toxic to plants. —Brandee Gruener, Southern Living, 25 Apr. 2026

Each day, an FX makeup team used around 400 prosthetics on the passengers, and made 3,000 gel capsules filled with sodium bicarbonate, citric acid and red powdered Kool-Aid. —Emily Longeretta, Variety, 6 Mar. 2026

For the mouth foam, each passenger actor received gelatin capsules filled with sodium bicarbonate and citric acid (the fizzing ingredients in antacid tablets), which had red powdered Kool-Aid to add a pinkish color. —Bryan Alexander, USA Today, 4 Mar. 2026

Word History

First Known Use

1885, in the meaning defined above

Kids Definition

sodium bicarbonate

noun

: a white weakly alkaline salt used especially in baking powders and fire extinguishers and in medicine as an antacid

called also baking soda, bicarbonate of soda

Medical Definition

sodium bicarbonate

noun

: a white crystalline weakly alkaline salt NaHCO₃ used in baking powders and in medicine especially as an antacid

called also baking soda, bicarb, bicarbonate of soda, sodium acid carbonate