Ketchup does have a shelf life of approximately 18 months after the manufactured date. However, if exposed to extreme heat while stored, it will break down in a matter of days. Actually ketchup has a shelf life of 6 months in the fridge. Keeping it cold retards the process of spoiling.
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Generally, it's good. Items with high acetic acid (vinegar) content, for example, like ketchup have a long shelf life. Not all acids and pHs are created equal though. Fresh citrus fruit like oranges have a similar pH to ketchup, but will happily mold away on the kitchen counter.
Glacial acetic acid is added to ketchup primarily as a preservative and flavoring agent. It helps to maintain the acidity of the ketchup, which not only enhances its taste but also inhibits the growth of harmful bacteria, extending the product's shelf life. Additionally, the acidity contributes to the overall balance of flavors, giving ketchup its characteristic tang.
Ketchup is acidic primarily due to the presence of tomatoes, which naturally contain citric acid and other organic acids. Additionally, vinegar, a common ingredient in ketchup, contributes to its acidity. The acidity not only enhances the flavor but also acts as a preservative, helping to inhibit the growth of harmful bacteria and extending shelf life.
Not much, ketchup is very acidic, and therefore even after a long time on the shelf, bacteria will still have trouble growing in it.
Heinz ketchup primarily contains tomatoes, distilled vinegar, high fructose corn syrup, corn syrup, salt, and spices. The exact blend of spices is proprietary, but it contributes to the ketchup's distinctive flavor. Additionally, it may contain preservatives to enhance shelf life.
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The shelf life of Chloramphenicol when it is unopened is 24 months. The shelf life when it's opened is 28 days.
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