Does epsom salts have an expiry date?

Epsom salts do not have a definitive expiry date, as they are stable and do not spoil like food products. However, they can absorb moisture over time, which may affect their texture and effectiveness. To maintain their quality, it's best to store them in a cool, dry place and keep the container tightly sealed. If they clump or lose their effectiveness, it's advisable to replace them.