Storing masala powder near a gas stove is generally not recommended due to heat and humidity, which can degrade its quality and flavor. It's best to store it in a cool, dry place away from heat sources.
Masala powders are blends of ground spices that are sensitive to environmental factors. The heat generated by a gas stove, even when not in use, can gradually warm the surrounding area. This elevated temperature, combined with the humidity often present in kitchens, can cause the oils in the spices to evaporate, leading to a loss of aroma and flavor. Furthermore, moisture can cause the powder to clump together, making it difficult to use and potentially promoting the growth of mold or bacteria, especially if the container isn't airtight. Storing masala powders in a cool, dark, and dry place, such as a pantry or cupboard away from the stove, will help preserve their quality and extend their shelf life. Ideally, use airtight containers to further protect them from moisture and air exposure.
To test if your masala powder is still fresh, rub a small amount between your fingers. If the aroma is weak or nonexistent, it's likely lost its potency and should be replaced.