Thai Product Dates, Batch Codes and Storage Symbols: A Practical Guide
Dates and codes on Thai packaging help identify when a product was made, how long it is expected to remain suitable, and which production batch it belongs to. The layout may be unfamiliar, but a few checks can prevent common mistakes—especially when the label mixes Thai and English.
First identify what the date means
Manufacturing date
A manufacturing date tells you when the product was produced or packed. Look for wording such as “MFG,” “MFD,” “manufactured” or the Thai abbreviation associated with production. It is not the same as an expiry date.
Expiry or use-by date
An expiry or use-by date marks the end of the period specified by the manufacturer under the stated storage conditions. Look for “EXP,” “expiry,” “use by” or equivalent Thai wording.
Best-before date
A best-before date generally relates to expected quality rather than automatically proving that a product is unsafe the next day. However, the category, packaging, storage history and local rules matter. Follow the label and do not use a product that appears compromised.
Be careful with date order and calendars
Numeric dates can be written day-month-year, month-day-year or year-month-day. Do not infer the order from numbers alone when both the day and month are 12 or below. Nearby letters, separators and other dates on the package often provide the clue.
Thailand commonly uses the Buddhist Era in local contexts. The Buddhist year is 543 years ahead of the Gregorian year: for example, 2569 BE corresponds to 2026 CE. Many export products already use the Gregorian year, so confirm the printed format before converting anything.
What a batch or lot code does
A batch code—often marked “LOT,” “BATCH” or a compact alphanumeric string—links the item to a production run. It may not be a date. Keep it available if you contact a retailer or manufacturer about a quality issue, recall or damaged product.
On a multipack, the outer pack and individual units may carry different operational codes. Photograph both before discarding the outer packaging.
Common storage instructions
- Cool, dry place: away from humidity, steam and direct heat.
- Protect from sunlight: do not leave by a window or in a hot car.
- Refrigerate after opening: the unopened product may be shelf-stable, but the opened one is not.
- Keep tightly closed: limits moisture, contamination and evaporation.
- External use only: the product should not be swallowed.
A thermometer, sun or open-jar icon can add information, but symbols are not perfectly standard across every category. Written directions should take priority.
How to check a product on arrival
- Confirm the item and quantity match the order.
- Check seals, caps, tamper evidence and outer packaging.
- Locate the relevant date and batch code.
- Read the storage and after-opening directions.
- Photograph any damage before opening the product.
Browse all products or the Best Sellers collection to see how Thai formats and multipacks are presented. For wider label-reading help, see our guide to understanding Thai product packaging when the label is not in English.
After opening: make your own record
Some cosmetics show an open-jar symbol such as 6M or 12M, indicating a suggested period after opening. Write the opening date on the container or keep a note on your phone. This does not override an earlier printed expiry date or signs that the product has changed.
When not to use the product
Do not use an item with unexpected leakage, swelling, mould, a broken safety seal, or a substantial unexplained change in odour, colour or texture. If the code is unreadable or the date type is unclear, ask the retailer for clarification rather than guessing.
Frequently Asked Questions
Is a lot number the same as an expiry date?
No. A lot number identifies a production batch. It may contain date-like digits, but it should not be interpreted as an expiry date unless the manufacturer confirms that coding system.
How do I convert a Thai Buddhist year?
Subtract 543 to convert a Buddhist Era year to the Gregorian year. For example, 2569 BE is 2026 CE. First confirm that the printed number actually uses the Buddhist calendar.
What does 12M inside an open jar mean?
It usually indicates 12 months after opening. Record when you first opened the product and still follow any earlier expiry date or specific storage direction.
Can I rely on appearance alone?
No. Use the printed date, seal, storage history and directions together. Some unsuitable products show no obvious visible change, while normal colour variation can occur in others.