Although onions smell spicy, they are still sweet after frying. This is a very good vegetable for frying meat and eggs. Just because onion has pungent smell, it has bactericidal effect, so it can be preserved longer than other vegetables, but this does not mean that onion can be preserved for a long time, and it is still perishable after being preserved for a long time, so it cannot be eaten at this time.

1. How long will onions go bad? Onions can be kept at room temperature for a week. Onions contain bactericidal ingredients, which can inhibit the growth of bacteria to a certain extent. However, because they will react with oxygen in the air, leading to oxidation, so they can only be stored for a week at most. Onions need to be stored in a dry and cool place, with a layer of dry straw on the indoor floor, and then put onions on it to keep the room ventilated. At the same time, take measures to shade the room. It can be kept for about 30 days if it is not damp.

Second, will onions be poisoned if they are left for a long time? If the onion is not rotten, it can still be eaten safely after a long time. However, if onions start to rot, they can't be eaten. Even if the rotten part is cut off, it is not suitable for eating, because bacteria may have penetrated into the seemingly complete part. Eating this onion can easily cause symptoms of food poisoning such as diarrhea and abdominal pain.

Onions will germinate or rot if they are not dried or stored correctly. Usually, onions germinate most easily at around 15 degrees Celsius. Germinated or even germinated onions will not produce harmful substances and can still be eaten.

How to preserve onions for a long time 1. Stocking storage Put onions in socks and tie a knot behind each onion, so that onions can be separated from onions, keep them ventilated, and then put them in a cool and ventilated place. Please be careful not to put it in the sun in a place that is too hot or too humid. If it's convenient, you'd better hang it up.

2. Preservation methods of wooden cases. If there are many onions, nail some wooden boxes, arrange them neatly with equal-width boards, and then put them neatly in onions, but store them in a cool and ventilated place.

3. It is not recommended to store a large amount of onions in the refrigerator. Only a small amount of onions should be stored in the ventilation hole of the refrigerator to prevent the onions from becoming very wet and causing germination and deterioration.