What is the shelf life of balsamic vinegar?

Balsamic vinegar, once opened, can last indefinitely if stored in the correct conditions. Optimally, it should be stored at a constant temperature between 4 and 30 degrees Celsius, away from sunlight in a sealed container.

Most types of vinegar have an indefinite shelf life because they are fermented, which makes them highly acidic and self-preserving. Vinegar has been used throughout human history as a preservative, allowing people to store food safely for long periods of time. Improperly stored or old vinegar may become cloudy or altered in color after a few years, which may also denote a change in taste, though it is still safe to eat.