Cosmetic Batch & Freshness Lab.
Decode production dates, calculate shelf life, and check PAO expiry for 40+ global and Indian luxury beauty brands. Never put oxidized actives on your barrier.
Found embossed on the crimp, outer carton base, or printed in ink on the bottle bottom.
Manufactured: March 2024
Brand: M·A·C Cosmetics (USA) · Batch: A34
Getting close to shelf life threshold. Use within the next few months and avoid warm storage.
Period After Opening (PAO) Calculator
Active Treatment & Vitamin C Serum
Standard PAO: 6 MonthsAntioxidants oxidize rapidly once unsealed. Dark yellow/orange means formula has degraded.
Where to Spot Batch Stamps
Crimp of Plastic Tubes
Heat-stamped into the wavy or flat top crimp seam of cleansers, sunscreens, and concealers. Usually 4–7 characters.
Bottom Glass or Sticker
Dot-matrix laser printed directly on the glass bottom or printed on the small circular shade sticker.
Outer Box Flap
Embossed or pressed on the bottom carton flap beside the barcode. It is not the 12-digit barcode.
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