MayonnaiseShelf Life, Storage, and Spoilage Guide
Pantry
Not RecommendedNot recommended
Unopened commercial mayonnaise can be stored in a cool, dark pantry until its 'Best By' date. Once opened, mayonnaise must be refrigerated immediately.
Refrigerator
2 months
Keep tightly covered in the refrigerator. Do not store in the refrigerator door, as temperature fluctuations can reduce quality and safety. Discard if left at room temperature for too long.
Freezer
Not RecommendedNot recommended
Mayonnaise separates when frozen, resulting in an undesirable texture. Freezing is not recommended.
Signs of Spoilage
- Sour or off-odor (rancid smell)
- Visible mold growth
- Significant discoloration (darker yellow or brown spots)
- Separation of ingredients with a watery or oily layer on top
- Unusual texture (slimy, lumpy, or excessively thick)
Room Temperature Safety
40°F–140°F (4°C–60°C)
Perishable foods, including opened mayonnaise, should not be left at room temperature for more than 2 hours. If the ambient temperature is above 90°F (32°C), discard after 1 hour.
Safe Handling
Always refrigerate commercial mayonnaise immediately after opening.
Discard mayonnaise if it has been left at room temperature for more than 2 hours.
If the ambient temperature is above 90°F (32°C), discard mayonnaise after 1 hour.
Use clean utensils to scoop mayonnaise to prevent cross-contamination.
Do not mix fresh mayonnaise with old mayonnaise.