An old bottle needs more than an age check
Perfume can deteriorate, but there is no single birthday when every bottle expires. If you have rediscovered a half-used favorite, start with its package instructions and storage history. A date or period-after-opening instruction and a change you notice in the liquid are different kinds of evidence; both deserve attention.
The FDA explains that cosmetic shelf life varies with the product, its use and its storage. That makes a blanket three-year or five-year rule a poor substitute for guidance about your particular fragrance. Nor does an unchanged smell prove that an old bottle is suitable for continued use. This guide offers a way to organise the information you have, rather than a home safety test.
Read the bottle and box together
Look for a printed date, wording explaining that date, and an open-jar symbol with a number such as 24M. Cosmetics Europe explains that the jar symbol describes a period after opening, expressed in months. In that example, 24M means 24 months after opening; it does not mean the product was manufactured in 2024. Photograph the packaging before discarding it and note when you first open the bottle.
European cosmetic labelling distinguishes minimum durability from the period after opening, with exceptions where the latter concept is not relevant. Consequently, do not assume that every perfume must display the same symbol. If a mark is unclear or you have lost the box, ask the manufacturer to interpret the label for that exact product and market.
A batch code is a clue to ask about
A short code on the base can look like a date without being an expiry instruction. Article 19 of the cosmetics regulation lists the manufacturing batch number or identifying reference separately from durability information. Treat those as separate questions when reading the pack.
If you want help with an older bottle, send the brand clear photographs of the code, label and packaging, together with the full fragrance name and concentration. Ask what the code identifies and what use or storage guidance applies. Even a confirmed manufacturing date cannot tell you where a second-hand bottle spent the intervening years.
Two bottles can have different histories
Consider a hypothetical pair bought on the same day. Bottle A stays in its box in a cupboard and appears and smells as its owner remembers. Bottle B repeatedly sits in a hot car and now smells noticeably different. These are illustrative examples, not measured wear tests. They show why purchase date alone cannot settle the question.
The observation supports saying that B has changed. It does not establish the precise cause, prove that A is safe, or reveal a universal expiry age. Temperature changes, sunlight and air are among the factors the FDA identifies as capable of altering cosmetics. Record the history you actually know, and leave unknown periods unknown.
Describe a change without diagnosing it
If something seems different, be specific: the liquid looks darker than an earlier photograph, the familiar opening smells different, or the sprayer is leaking. Those descriptions give customer care something useful to assess. A vague statement that the perfume feels old gives much less information.
Avoid comparing an unidentified older bottle with a different concentration and calling the difference deterioration. Write down whether yours is an eau de toilette, eau de parfum or another version before seeking a comparison. If its condition concerns you, pause use and ask the brand about that bottle rather than repeatedly applying it to decide whether it passes.
Store it with its next use in mind
CHANEL advises keeping its fragrances away from heat and light, tightly sealed, and preferably in their original packaging. A cupboard away from a radiator or sunny window is a practical way to follow that advice. Choose somewhere convenient enough that the bottle returns there after use.
Better storage is a sensible step for a bottle you are keeping, but it does not establish that a previous change has been reversed. Keep a simple note of the opening date and any relevant package guidance. For an inherited or second-hand fragrance, record the history as unknown rather than treating the day you received it as the beginning of its life.
Make the decision bottle by bottle
Follow the manufacturer's dating and use instructions first. If those are missing, unclear or already exceeded, seek product-specific guidance; age-based advice from an unrelated perfume cannot fill that gap. A treasured bottle can also be kept as a memento without being worn.
For future purchases, choose a size that fits how often you actually wear that scent. The useful goal is a manageable collection with known opening dates and sensible storage, not a collection you must rush through because someone assigned every fragrance the same deadline.