Perfumes expire and lose their potency over time. Once opened, a perfume can last a year or longer, sometimes even as long as three to five years. This length of time depends on how the scent is stored and its chemical composition.
Although perfume does not display an expiration date, by noting changes in the scent and color of the perfume, it's possible to know if it's still wearable. To lengthen a perfume's shelf life, it should be stored in a cool, dark place away from sunlight, heat and humidity.
For some, a 50-year-old perfume can still retain its attractive smell. The expiration date of a perfume varies drastically. In fact, a jar of perfume found in the tomb of Pharaoh Tutankhamun still remained radiantly fragrant after thousands of years, according to Tour Egypt.