Check the expiration or sell-by date
Look for cracks, leaks, or a powdery shell
Smell the egg after cracking it
Discard it if it smells sulfurous, rotten, or foul
Check the egg white and yolk for unusual colors
Discard it if the white is pink, green, or iridescent
Discard it if the yolk is discolored, flattened, or unusually runny
Do a float test in water
Discard it if it floats
Discard it if the shell feels slimy or sticky
Discard it if there is mold on the shell
Discard it if it has been left out at room temperature for more than 2 hours
Discard it if you are unsure about its freshness