It is a Common Misconception That Making Ketchup Requires the Use of a Refrigerator; However, This is not the Case.
Do bottles of ketchup ever find their way onto the tables at restaurants? In order to keep ketchup at room temperature, it doesn’t need refrigeration. It is room temperature stable due to the naturally high acidity that it possesses, which allows it to maintain its freshness.
Ketchup can be kept at room temperature for up to one month if it is not refrigerated. If you want to keep it at its freshest for as long as possible, refrigerate it. The beneficial effects of the cold will be enhanced the longer the substances are subjected to its effects. Because it contains preservatives, ketchup does not need to be stored in the refrigerator to maintain its quality.