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Originally Posted by gottabekd

Ketchup doesn't need to be refrigerated. But it usually tastes better.

I'd disagree. It keeps better than a lot of food at room temperature, but bacteria and micro-organisms will still spread faster if it's warm.


http://sneakykitchen.com/Ideas/ketchup.htm

Should ketchup be refrigerated? Or can it be left out on the table or lunch counter? According to Donna Scott, a Food Safety Specialist with the Department of Food Science at the Cornell Cooperative Extension in Ithaca, New York:

"Ketchup should be stored in the refrigerator after opening. Kept chilled, it should be all right for up to six months. Ketchup keeps better than most foods, partly because of its acidity, but it isn't sufficiently acid to kill bacteria, mold and other microorganisms that may get into the bottle after opening. Refrigeration doesn't kill the 'bugs' either, but does slow their growth. She also recommends keeping the lid and mouth of the bottle clean."

Back on topic:

After reading about salsa expiry, it sounds like a lot people say you should use it within a week of opening...