Yes, xanthan gum can go bad, although it has a relatively long shelf life.
Xanthan gum products, including blends and agglomerated versions, typically have a shelf life of approximately three years when stored correctly. Proper storage involves keeping the product in a cool, dry place at ambient temperatures and relative humidities below 60%.
Here's a breakdown of factors affecting the shelf life of xanthan gum:
- Storage Conditions: Ideal conditions significantly extend the shelf life. Excessive heat, humidity, or exposure to air can degrade the product.
- Packaging: The packaging plays a vital role. An airtight, properly sealed container helps maintain freshness and prevent moisture absorption.
- Contamination: Introducing contaminants, such as moisture or other food particles, can accelerate spoilage.
How to tell if xanthan gum has gone bad:
- Changes in appearance: Look for clumping, discoloration, or any unusual changes in texture.
- Off odor: A sour, musty, or otherwise unpleasant smell indicates spoilage.
- Loss of thickening ability: If the xanthan gum no longer thickens liquids as expected, it may have degraded.
Best Practices for Storing Xanthan Gum:
- Store in an airtight container.
- Keep in a cool, dry place, away from direct sunlight and heat sources.
- Avoid exposing the xanthan gum to moisture.
- Use a clean, dry utensil when scooping out the powder.
