Processed condiments usually have a clear expiration date on the packaging if they are unopened. However, once the packaging is opened, the shelf life of the food is often affected. Here are some common condiments' shelf life after opening:
1. Tomato sauce
Unopened: 1 year. Once opened, if stored in the cupboard, it has a shelf life of about 1 month, and refrigeration can extend its shelf life.
2. Mayonnaise
Unopened: 2-3 months. However, to ensure quality, refrigerate immediately after opening and avoid leaving it outside the refrigerator for more than 2 hours.
3. Mustard sauce
Unopened: 2 years. Once opened, it can be stored in the refrigerator or cupboard for 6-8 months.
4. Vegetable oils (such as chili oil and Sichuan peppercorn oil)
Unopened: 6 months. After opening, it's recommended to store in the refrigerator to prevent spoilage and use within 1-3 months.
5. Chili Sauce
Unopened: Shelf life 1 year. Once opened, if stored in the cupboard, it has a shelf life of approximately 1 month, and refrigeration can extend this shelf life.
6. Sour Cream
Unopened: Shelf life 2 weeks in the refrigerator. Once opened, it should also be stored in the refrigerator and consumed within 2 weeks.
7. Salad Dressing
Unopened: Shelf life 10-12 months. However, once opened, it's recommended to store in the refrigerator and use within 3 months.
8. Jam
Unopened: Shelf life 1 year. Once opened, it can be refrigerated for up to 1 year to maintain freshness.
9. Peanut Butter
Unopened: Shelf life 6-9 months. However, after opening, it should be consumed within 2-3 months, and the shelf life can be extended by storing it in the refrigerator.