Ketchup doesnt actually have to be kept in the refrigerator. In fact ketchup makers used to suggest that keeping it in a cupboard rather than the fridge aids the flavour process, i.e. It will mature. It is only over the last 30 years that we now naturally assume everything should be kept in a refrigerator. Use your sense of taste and smell. If a food smells or tastes wrong then it is probably gone off, it doesnt it is probably fine. We waste tooooooo much food unnecessarily these days.
