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FOOD STORAGE — HOW LONG CAN YOU KEEP...

BAKING SODA — OPENED PACKAGE

Pantry Refrigerator
Blue Arrow Green Arrow 6 months
Tips
  • The precise answer to the question “How long does baking soda last once opened?” depends to a large extent on storage conditions; store in cool, dry area and keep package tightly closed.
  • Time shown is for best quality only — in most cases, opened baking soda will not spoil, but it will lose its potency over time and not perform as intended.
  • 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.
  • “Best By,” “Best if Used By,” and “Use By” dates on commercially packaged foods sold in the United States represent the manufacturer's estimate of how long the product will remain at peak quality — in most cases, the baking soda will still be safe to consume after that date, although it will lose potency over time.

Sources: For details about data sources used for food storage information, please click here.

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