Check the expiration or sell-by date
Look for cracks, leaks, or a slimy shell
Smell the egg after cracking it open
Discard if it has a sulfur, rotten, or unusual odor
Look for unusual discoloration in the egg white or yolk
Discard if the egg white is pink, green, or iridescent
Discard if the yolk is unusually runny, discolored, or flattened
Use the float test in water
Discard if the egg floats
Discard if the egg feels unusually light or sounds sloshy when shaken
Discard if there is mold on the shell
Discard if the egg has been stored improperly or left out too long