Shelf Life:
* Ideal: Baking soda can last for 1-2 years if stored properly.
* Beyond 2 years: It will still be usable but may start to lose potency.
Signs of Expiry:
* Clumping: If the baking soda starts clumping together, it's likely past its prime.
* Weak Reaction: If it doesn't react as strongly with vinegar or acid (like lemon juice), it's probably losing its effectiveness.
* Discoloration: A change in color (especially yellowing) could indicate a decrease in quality.
Storage:
* Airtight Container: Store in a cool, dry place in an airtight container.
* Avoid Humidity: Moisture is the biggest enemy of baking soda, so keep it away from areas with high humidity.
Testing for Potency:
* Vinegar Test: Mix a teaspoon of baking soda with a tablespoon of vinegar. A vigorous reaction (lots of bubbles) means it's still good.
* Acid Test: Mix a teaspoon of baking soda with a tablespoon of lemon juice. A strong fizz indicates it's still potent.
In a Nutshell:
While baking soda generally has a long shelf life, it's good practice to check its potency every now and then to ensure you're using fresh and effective product.
