Check the expiration or sell-by date
Look for cracks, leaks, or unusual shell damage
Smell the egg after cracking it open
Discard it if it smells sulfurous, rotten, or foul
Inspect the egg white and yolk for unusual colors or textures
Discard it if the white is pink, green, or iridescent
Discard it if the yolk is discolored, slimy, or unusually runny
Do a float test in water
Discard it if it floats
Discard it if it makes a sloshing sound when shaken
Discard it if there is mold on the shell or inside
Discard it if the shell feels unusually slimy or sticky
When in doubt, throw it out