https://www.fragrancex.com/blog/does-perfume-expire/#:~:text=Yes%2C perfume and cologne do,-and-fast expiration date.
Does Perfume Expire?
Yes, perfume and cologne do go bad. However, how long they last depends on the scent’s chemical composition.
Many perfumes, especially from well-respected brand names like Chanel or Marc Jacobs, don’t have a hard-and-fast expiration date. Some will begin to expire in less than a year and others will last upwards of 10 years. However, three to five years is the average shelf life of a fragrance.
According to experts, perfumes with heavier base notes will last the longest. Some people compare these perfumes to a fine wine—they get better with age. Examples of scents with heavier base notes include oriental scents, such as those with patchouli and amber.
When the lighter base notes are prominent in a fragrance, the solution is often more volatile. Citrus, green and floral perfumes, for instance, often don’t last as long.