Baking Soda: Clearing Up the Myths (first) Sodium bicarbonate is inorganic—no, it’s not organic, and no, it doesn’t contain aluminum. Made from natural sources: soda ash, water, and carbon dioxide. Baking soda has an indefinite shelf life, but for baking, it can lose potency over time. Test it with vinegar—if it fizzes, it’s still good. Uses go beyond baking: cleaning, deodorizing, soothing insect bites, as an antacid, and more. Store in a cool, dark place in an airtight container for long-term