How Long Does Baking Soda Last Once Opened?


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6 months


Shelf Life Tips

  • How long does baking soda last once opened? The precise answer to the question depends to a large extent on storage conditions; store in cool, dry area.
  • To maximize the shelf life of opened baking soda, keep the package tightly sealed after opening.
  • How long does opened baking soda last at room temperature? Properly stored, opened baking soda will generally stay at best quality for about 6 months.
  • Is baking soda safe to use after the "expiration" date on the package? Yes, provided it is properly stored and the package is undamaged — commercially packaged baking soda will typically carry a "Best By," "Best if Used By," "Best Before," or "Best When Used By" date but this is not a safety date, it is the manufacturer's estimate of how long the baking soda will remain at peak quality.
  • How can you tell whether opened baking soda is still good to use? To test whether opened baking soda is still potent enough to be effective: add one teaspoon of baking soda to 3 tablespoons of vinegar - if mixture bubbles, the baking soda is still potent enough to use.

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