· baking soda is good indefinitely, but it can lose potency over time. · while it may lose some of its leavening power if exposed to moisture or air, pure baking soda itself does not expire in the traditional sense. · it might sound obvious, but the fresher your baking soda is, the more effective it will be for your cooking and cleaning projects. An open box of baking soda (aka sodium bicarbonate) can be safe to use for anywhere between one and three years. “it’s unlikely to make you sick if it’s expired , but it won’t work as well in recipes. ” · expired baking soda is still usable ! · learn how to tell if your baking soda or baking powder has expired with simple tests to ensure your baked goods rise perfectly every time. Understanding its shelf life and proper storage can help ensure it remains effective for various uses, making it a reliable household item for years to come. Learn how to test it with vinegar or lemon juice and how to store it properly to avoid moisture. Can baking soda still be good after expiration date? Learn how to store baking soda and what to do with old baking soda for cleaning purposes. How long does baking soda last? Find out how long baking soda lasts, how to tell if its still good for baking, and uses for expired baking soda. How do you know if baking soda is expired? · “ baking soda doesnt exactly go ‘bad’ in the way that food does, but it can lose its effectiveness over time,” says tara collingwood, ms, rdn, a sports dietitian based in orlando, florida. · baking soda does expire and lose its leavening power, but you can check it with a simple fizz test. Does baking soda go bad?