Check the expiration or sell-by date

Look for cracks, slime, or powdery residue on the shell

Smell the egg after cracking it open

Discard it if it has a strong sulfur, rotten, or unusual odor

Check for unusual discoloration in the egg white or yolk

Discard it if the egg white is pink, green, or iridescent

Discard it if the yolk is green, gray, or moldy

Do a float test in water

Discard it if it floats

Discard it if the shell feels unusually sticky or slimy

Discard it if the egg has been stored improperly or for too long

Discard it if there is any sign of mold inside or outside the egg