The shelf life of vinegar is almost indefinite. Because of its acid nature, vinegar is self-preserving and does not need refrigeration. White vinegar will remain virtually unchanged over an extended period of time. And, while some changes can be observed in other types of vinegars, such as color changes or the development of a haze or sediment, this is only an aesthetic change. The product can still be used with confidence. Vinegar is best stored airtight in a cool, dark place.