Does Baking Soda Expire? Experts Say Yes—Here’s the Proof!

Tue, 05 May 2026 22:04:21 +0000

Does Baking Soda Expire? Experts Say Yes—Here’s the Proof If you’ve ever opened a box of baking soda and wondered how long it truly lasts, you’re not alone. While baking soda (sodium bicarbonate) isn’t a perishable product like milk or herbs, experts confirm that it does have an expiration timeline. Understanding when and why this occurs can help you maintain optimal baking, cleaning, and health benefits. What Happens When Baking Soda Expires? Baking soda remains chemically stable for years when stored properly, but over time, its potency diminishes. According to food scientists and chemical experts, baking soda slowly loses its effectiveness due to moisture absorption and exposure to air. While it doesn’t spoil or become unsafe, its efficacy drops—making it less effective in baking, deodorizing, and cleaning applications.