If the color appears to have changed since opening the bottle, this may indicate spoilage.įor example, a red wine that has gone bad might have a brownish tint, whereas a white wine may darken or have a deep yellow or brownish straw color when it goes bad. The first thing that a person can observe is the color of the wine. Several signs may indicate that a bottle of wine has gone bad. For example, people can place white wine in the fridge and red wine in a cool, dark place.īelow is an estimate of how long certain wines may last if a person stores them correctly once they are open: They can do this by placing the cork or screw-top back on the bottle and storing it in a place suitable for the type of wine. If a person does not intend to finish a bottle of wine, they should minimize how much oxygen and bacteria interact with the wine to make it last longer. If bacteria come into contact with open wine, they can alter its flavor and consistency. Oxidation can cause wine to go bad and may turn it into vinegar.īacteria and other microbes can also cause wine to spoil. When a bottle is open, the wine inside encounters air, which begins the oxidation process. Opened wine does not last as long as unopened wine because once a person has opened a bottle of wine, it begins to oxidize.
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