Where is the batch code on a perfume bottle or a cosmetic product?

A batch code is a short combination of 3 to 8 letters and digits. It is laser-etched under the glass, ink-jetted on the base, or embossed under the box flap. It is not the 13-digit barcode: the EAN identifies the product on a shelf, the batch code identifies when it was made.

How do I check how old a cosmetic is from its batch code?

Find the 3 to 8 character code under the bottle or under the box flap, then type or scan it into CosmeScan. The tool calculates the manufacturing month, the age of the formula and the remaining shelf life, across 4,155 brands. The decoding runs in your browser, no photo is sent to a server.

How do I read a Dior, Chanel, Guerlain or L'Oréal batch code?

At LVMH (Dior, Guerlain, Givenchy) the code is 4 characters, for example 4B01. The first one is the last digit of the year, the second is the month with the letter I skipped (A is January, B is February). At L'Oréal (Lancôme, YSL, CeraVe) the third letter of a 6 character code carries the year: 38Z401, with X for 2024, Y for 2025 and Z for 2026. At Estée Lauder (MAC, Tom Ford) it is the third digit of a 3 character code, for example AB5. Every house has its own rule, and some do not decode publicly.

How can I tell if a perfume has gone off?

A perfume does not turn all at once like food. Its top notes oxidise with air, light and heat. CosmeScan sorts freshness into three states: fresh under 24 months, watch between 24 and 36 months, past it beyond 36 months. Three years after opening, citrus fades and the alcohol can turn. The little jar symbol on the label gives the exact figure for your product.

What is the ten-year batch code cycle?

The big houses reuse their sequences every ten years: 9P01 can mean February 2019 or February 2009. The vintage mode in CosmeScan switches between a current bottle and a collector from the 2010s. When two dates remain possible, CosmeScan shows the result as ambiguous instead of picking one at random.

How do I reassure a buyer about the freshness of a perfume I am selling?

CosmeScan generates a 1080 × 1080 dating card with the batch code, the manufacturing date calculated from that code and a verification link. The link takes the buyer back to the brand page and to any recall on record. The card is built for a Vinted, eBay, Leboncoin, Vestiaire or Mercari listing. It documents the dating, it is not an expert appraisal and it does not establish authenticity.

Estée Lauder Companies • Clinical Functional Skincare

The Ordinary (Deciem) バッチコード（製造番号）＆鮮度チェッカー

The Ordinary (Deciem)（形式例: 3AB1 or 2K02 (4 chars)、Estée Lauder Companies）の無料バッチコード検索ツール。製造年月、開封後使用期限PAO（12ヶ月）、EU安全リコールやメルカリ出品用証明書をCosmeScanで即座に確認。

Quick The Ordinary (Deciem) Batch Verification

Decode Batch Code

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The Ordinary (Deciem) Technical Decoding Rules

Batch Code Format	`3AB1 or 2K02 (4 chars)`
Code Location	Printed in teal/grey ink on dropper glass or box side
Period After Opening (PAO)	12 months
Unopened Shelf Life	24 months

⚠️ Decennial Batch Cycle (Vintage Mode) : The Ordinary (Deciem) recycles its batch codes every 10 years. CosmeScan includes a 1-tap Vintage Mode switch.

The Ordinary (Deciem) 製造年別バッチコード早見表（2026年・2025年・2024年）

Batch Code	Year	Status (24M Unopened)
`A16`	2026	✓ Fresh (Valid until 2029)
`A25`	2025	✓ Fresh (Valid until 2028)
`A34`	2024	⚠ Check PAO (Valid until 2027)
`A12`	2022	✕ Past 36M Unopened Window

FAQ Answer-First — The Ordinary (Deciem)

The Ordinary (Deciem)のバッチコード（製造番号）はどこに記載されていますか？

The Ordinary (Deciem)（Estée Lauder Companies）のバッチコードは通常、次の場所にあります：Printed in teal/grey ink on dropper glass or box side。13桁のJAN/EANバーコードとは別の3〜8桁の刻印です。

The Ordinary (Deciem)のバッチコードの形式と2026年最新の読み方は？

The Ordinary (Deciem)のバッチコードは「3AB1 or 2K02 (4 chars)」形式です（例：2026年製造は A16、2025年製造は A25）。CosmeScanに入力すると正確な製造年月が即座に判明します。

The Ordinary (Deciem)の化粧品や香水に使用期限はありますか？未開封・開封後の保管期間は？

はい、The Ordinary (Deciem)の製品には消費・使用期限があります。バッチコードから算出される製造日から未開封で約24ヶ月、開封後は容器記載のPAOマークに従い約12ヶ月が推奨使用期限です。

The Ordinary (Deciem)の香水やコスメが本物か偽物（模倣品）か見分ける方法は？

The Ordinary (Deciem)の真贋を見分ける3点：(1) ボトル底面の刻印コードと外箱のバッチコード（3AB1 or 2K02 (4 chars)）が完全一致すること、(2) スプレー金具のカシメが機械圧着で均一であること、(3) CosmeScanの無料鑑定で製造日と複製シリアルを照合することです。