Activated charcoal, when stored properly, can have a reasonably long shelf life without refrigeration. The typical shelf life of activated charcoal is around two to three years. However, it's essential to keep it in a cool, dry place and away from moisture, heat, and direct sunlight. Exposure to these elements can reduce its effectiveness and shorten its lifespan.
Activated charcoal is highly porous and used for its adsorption properties. It is commonly utilized in various applications, including water purification, air filtration, and medical treatments for certain types of poisoning. If you have activated charcoal and are unsure about its quality or expiration date, it's best to check the packaging or contact the manufacturer for specific information.
Remember that using expired or compromised activated charcoal may lead to reduced effectiveness and could potentially pose health risks, especially in medical or emergency situations. Always use fresh and properly stored activated charcoal when necessary.