The question of how long it is safe to eat chicken eggs worries every home cook, because this product is the basis of the diet in many families. Improper storage can lead to spoilage of the protein and yolk, which can lead to serious food poisoning and salmonellosis infection. Shelf life directly depends on the temperature, the integrity of the protective film on the shell and environmental humidity.
Modern refrigerators can extend life products, but even they have their own limitations and risk areas. Many people mistakenly believe that the refrigerator door is the ideal location, but temperature changes when opening can shorten storage time. In this article we will look in detail at how to properly organize storing eggsin order to preserve their taste and safety for the maximum period.
It is important to understand that the lifespan of a product is calculated not only in days, but also in the conditions in which it finds itself immediately after purchase. Dietary the properties are preserved only for the first week, after which the egg goes into the table category, and then may become completely unusable. Let's find out what factors influence this process and how to control them.
Factors influencing the safety of the product
The main enemy of freshness is unstable temperature. When you place the package on the door shelf, it is exposed to constant heat every time you open the refrigerator to get milk or water. This leads to moisture condensation processes starting inside the shell, which facilitates the penetration of bacteria through the pores.
The second critical factor is the condition cuticles of the natural protective film covering the shell. When washing eggs under running water, this film is washed off, allowing direct access for pathogenic microorganisms inside. That is why it is recommended to wash the product immediately before cooking, and not before storing it.
It is also worth considering the humidity in the refrigerator compartment. Air that is too dry will cause moisture to evaporate through the pores of the shell and the contents will dry out, creating a large air chamber. Excessive humidity, on the contrary, can provoke the growth of mold on the surface of the shell, especially if the eggs are in cardboard packaging.
⚠️ Attention: Never store eggs near foods with a strong odor, such as smoked meats, fish or citrus fruits. The porous structure of the shell easily absorbs foreign aromas, which can irrevocably spoil the taste of the dish.
Standard shelf life according to GOST
According to current standards, the terms of sale and consumption are strictly regulated and depend on the category of the product. Dietary eggs, which are considered the most valuable, must be sold within 7 days after laying. After this period, they automatically become table eggs, although their consumption is still safe.
Table eggs bought in a store have a longer shelf life. If the temperature range is from 0 to +20 degrees Celsius, they can be stored for up to 25 days. However, in a home refrigerator, where the temperature is stable around +2...+4 degrees, this period can be increased.
The table below presents official data on shelf life depending on the ambient temperature:
| Product type | Temperature (°C) | Shelf life (days) | Note |
|---|---|---|---|
| Dietary | 0...+20 | 7 | Highest category of freshness |
| Canteens (store) | 0...+20 | 25 | Standard sales period |
| Canteens (refrigerator) | +2...+4 | 90 | Optimal conditions |
| Washed eggs | +2...+4 | 12 | Without protective film |
You must remember that the indicated periods are relevant for whole eggs in the shell. If the integrity of the shell is damaged, the product must be used within a few hours or preserved thermally. GOST also implies that each egg must be marked with the date of sorting, which allows you to accurately determine the age of the product.
Rules for placement in the refrigerator
To maximize the life of the product, it is important to choose the right place in the refrigerator. As mentioned earlier, a door is not the best option due to temperature fluctuations. The ideal place is the middle or lower shelf of the main compartment, where the temperature is most stable.
It is best to store eggs in their original cardboard packaging. It performs several important functions: protects against foreign odors, prevents moisture absorption and serves against mechanical damage. In addition, the tray usually retains the production date, which allows you to control freshness.
If the original packaging has been thrown away, use special plastic containers with a lid designed for the refrigerator. It is not recommended to place eggs in bulk on a shelf, as this increases the risk of breakage and contamination. Also avoid proximity to semi-finished meat products or raw meat to avoid cross-contamination with bacteria.
☑️ Checking storage conditions
How to check the freshness of eggs at home
Even if you follow all the rules, you may encounter an unscrupulous manufacturer or simply forget when the product was purchased. There are several proven ways to determine the quality of a product without breaking it. The simplest and most reliable method is the water test.
To carry out the test, pour cold water into a glass and carefully lower the egg into it. If it sinks to the bottom and lies horizontally, the product is absolutely fresh. If the blunt end floats up and the sharp end rests on the bottom, the egg is about 1-2 weeks old, it is edible, but requires heat treatment. If the egg has completely floated to the surface, it must be thrown away, since too much gas has formed inside due to the activity of bacteria.
The second method is visual inspection after breaking. A fresh egg has a firm, high yolk that holds its shape in the middle of the white. The protein is divided into two fractions: thick around the yolk and more liquid around the edges. If the yolk spreads immediately and the white is uniformly runny and watery, the product is old. Also, a sign of spoilage is an unpleasant hydrogen sulfide smell.
⚠️ Attention: If you smell even a slight rotten smell when breaking, discard the product immediately. Eating such an egg even after frying can lead to severe toxic damage to the body.
Why does the yolk float?
Over time, moisture evaporates through the pores of the shell, and the air chamber (puga) at the blunt end increases. The more air inside, the higher the buoyancy of the egg.
Features of storing washed and broken eggs
Situations when the egg is cracked in the bag or needs to be washed require a special approach. As already mentioned, washing destroys the protective layer. Therefore, washed eggs cannot be stored for a long time. Their maximum lifespan in the refrigerator is no more than 12 days, and only if they are in a closed container.
If the egg is cracked but not leaking, it can be used within the next 24 hours, after transferring the contents into a clean glass jar with a tight lid. A whole broken egg (yolk and white together) can be stored in the refrigerator for no more than 2 days. Separately beaten whites or yolks can last up to 4 days if the container is sealed.
For long-term storage, broken eggs can be frozen. The whites are frozen separately, the yolks are pre-mixed with a pinch of salt or sugar to prevent gelling. When frozen, the egg mass can be stored for up to 10-12 months, but after defrosting it is only suitable for heat treatment (omelettes, baked goods).
Signs of spoilage and health hazards
Ignoring signs of spoilage can lead to salmonellosis - an acute intestinal infection. Salmonella bacteria actively reproduce at room temperature, so eggs that have lain on the table for more than 4-6 hours are no longer considered safe to eat raw.
Signs of a spoiled product include:
- 🥚 Dull, rough shell with an oily coating (normally it is matte).
- 🥚 Pinkish or rainbow tint of the protein when broken (a sign of bacterial infection).
- 🥚 Sticking of the contents to the shell from the inside.
- 🥚 The presence of black or green spots under the shell.
Particular care should be taken when preparing dishes where eggs do not undergo full heat treatment (mayonnaise, eggnog, tiramisu, poached eggs). For such purposes, use only a product labeled “Dietary” or make sure that no more than 7 days have passed since the sorting date. For hard-boiling or adding to dough, you can use table eggs up to 3-4 weeks old.
Is it possible to freeze raw eggs in the shell?
Absolutely not. When frozen, the liquid inside expands and the shell will burst, creating a mess in the freezer and ruining other foods. In addition, the texture of the white after defrosting will become rubbery and unsuitable for eating.
Why does a boiled egg have a green coating around the yolk?
The green-gray rim around the yolk of a boiled egg is the result of a chemical reaction between the iron from the yolk and the sulfur from the white. This happens when cooking is too long or the water temperature is high. Such an egg is safe, but may have a sulfur taste.
How to properly boil eggs so that they are easy to peel?
For easy cleaning, use eggs that are not the freshest (they should be 7-10 days old). Cook them by immersing them in already boiling water, and after boiling, cool them sharply in ice water. A sharp temperature change helps the film peel away from the protein.
Does the color of the shell affect the shelf life?
No, the color of the shell (white or brown) depends only on the breed of chicken and does not affect the taste, nutritional value or shelf life of the product. The rules are the same for all eggs.
What to do if the purchased eggs turn out to be sticky?
The stickiness of the shell is a sure sign that the protective film has been destroyed and bacterial growth has begun, or the egg has been contaminated with protein from a cracked neighbor. It is better not to eat such eggs, especially if there is an unpleasant odor.