In general, red wine has a shelf life. If you look at the logo of red wine, the shelf life is generally 10 year. This is because our country sets the longest shelf life of wine as 10 year to ensure the food safety of consumers, just like other foods. There is also a wine that has no definite shelf life and can be preserved for a long time. For example, some imported wines with alcohol content above 10%. How long can an open bottle of red wine last at most is also judged according to the variety of red wine, such as the variety of red wine, brewing technology, aging time, preservation state, etc., and the preservation time is different. Most red wine should be drunk within 3-5 days if it is put in the refrigerator after opening. Generally speaking, the higher the acidity and alcohol content of red wine, the more resistant it is to drink.

How to preserve red wine after opening it?

Most of the red wine you drink is the best to drink at one time after opening a bottle. Otherwise, if many red wines cannot be completely isolated from air, light and low temperature, they will easily deteriorate. If we can isolate the air well, we can delay the oxidation reaction. If there is no finished red wine, you can reseal the bottle with a cork, and then put the red wine in the refrigerator. It is best not to put it horizontally, which will affect the alcohol content. He can pump air out of our bodies to prolong the preservation time.

How to see if the red wine has gone bad?

If you want to see if red wine has gone bad, you can look at the color of red wine. Although red wine has many colors, it is generally purple and pomegranate red. With the increase of years, the color of red wine will become darker. If red wine lasts too long, when the color of red wine turns brown or brown, it will be difficult to drink and have a strange taste. You can still smell red wine. Red wine will taste of acetic acid when it expires. It is best not to drink such wine.

Finally, the alcohol content of red wine itself is relatively low. After opening the bottle, the air is very easy to contact with alcohol. If you don't finish it for a long time, you will lose the taste and aroma of red wine itself.