Eggs are one of the most sought-after products in the diet of a modern person, and the issue of their proper storage is relevant for every home cook. Shelf life of eggs in the refrigerator directly depends on many factors, including temperature, shell integrity and method of pre-processing. Improper storage can lead not only to deterioration of taste, but also to the proliferation of dangerous bacteria such as salmonella.
Many consumers mistakenly believe that this product can lie in the cold for months without changes, but biological processes inside the shell continue even at low temperatures. It is important to understand the difference between raw and cooked instances, and also take into account where exactly in the refrigerator compartment they are located. In this article we will analyze in detail GOST standards, scientific data and practical tips that will help you always eat only fresh and safe products.
Violation of storage conditions often causes food poisoning, so knowing the exact time frame for use is critically important. The maximum shelf life of raw eggs in the refrigerator at a temperature of 0 to +5°C is 90 days, but only if they are not washed. Next we will look at how various factors influence this period and how not to make a mistake in your choice.
Standard shelf life according to GOST and SanPiN
In the Russian Federation, the circulation of food products is strictly regulated by state standards, which set deadlines for sales to guarantee consumer safety. According to current standards GOST R 52121-2003, chicken eggs are divided into dietary and table, and the permissible time for them to remain on a store shelf or in your refrigerator depends on this classification. Eggs are considered dietary if their shelf life does not exceed 7 days from the date of laying, after which they automatically move into the table category.
Table eggs can be stored much longer, but there are clear boundaries here too. Subject to a temperature range of 0 to 20 degrees Celsius and a relative air humidity of 85-90%, their shelf life is 25 days. However, if you place the product in the refrigerator, where the temperature is stable in the range from 0 to +5 degrees, this period increases. For washed eggs, the time period is significantly reduced, since the removal of the protective film opens the pores of the shell for the penetration of microorganisms.
⚠️ Attention: The terms indicated on the packaging by the manufacturer may differ from state standards to a lesser extent. Always rely on the date indicated on the tray if it is less than the maximum permissible according to GOST.
It is important to consider that the standards are relevant for a product that has not been heat treated and has no visible damage. Any deviations from standard conditions, such as sudden changes in temperature or storage near strong-smelling substances, may reduce the shelf life of the product. Therefore, when buying eggs “with a reserve”, make sure that you can provide them with proper conditions.
How long raw eggs are stored depending on the place
The location of the product inside the refrigerator compartment plays a key role in maintaining its freshness. The temperature in different areas of the refrigerator can vary, which directly affects the speed of biochemical processes inside the egg. The refrigerator door, despite the presence of special trays, is the least suitable place for long-term storage due to constant temperature changes when opening and closing.
The optimal place to place eggs is the middle shelf or freshness zone, where the temperature regime is most stable. Here fluctuations are minimal, which makes it possible to preserve the aging process. If you store the product in a special plastic package, you should not remove it from there, as it protects the shell from absorbing foreign odors and mechanical damage.
There is a widespread belief that you need to wash eggs immediately after purchase. This misconception can cost you the product, since when washed, the shell film is destroyed, and bacteria have free access inside through the pores. Eggs should be washed immediately before use, and not before storing.
Below is a table systematizing data on the shelf life of raw eggs depending on temperature conditions:
| Type of eggs | Storage conditions | Temperature | Maximum period |
|---|---|---|---|
| Dietary | Refrigerator | 0...+5°C | 7 days |
| Dining rooms (not washed) | Refrigerator | 0...+5°C | 90 days |
| Dining rooms (washed) | Refrigerator | 0...+5°C | 12-25 days |
| Dining rooms | Room t° | up to +20°C | 25 days |
Shelf life of boiled and cooked eggs
After thermal shelling, the white and yolk become vulnerable to bacteria, so the shelf life of the finished product is significantly reduced. Boiled eggs in their shells, shelled or prepared in salads and dishes require special attention and quick consumption. If you hard-boil an egg and leave it in the shell, it can stay fresh in the refrigerator for up to 7-10 days.
The situation changes dramatically if the shell is damaged or completely removed. A peeled boiled egg is an ideal environment for the proliferation of microorganisms, so its shelf life in the refrigerator is no more than 24-48 hours. If you plan to take a boiled egg on the road or to work, be sure to pack it in an airtight container and try to eat it within a few hours.
Dishes containing eggs, such as omelettes, casseroles, or salads with mayonnaise, have their own, often shorter, shelf life. Salads with boiled eggs are recommended to be consumed within 12 hours after preparation, even if they are refrigerated. Mayonnaise and other dressings accelerate the spoilage process, making the dish potentially dangerous already on the second day.
Signs of a spoiled boiled egg are an unpleasant hydrogen sulfide smell, a gray or greenish coating on the yolk (although a slight graying of the yolk during prolonged cooking is normal) and a slimy surface of the white. If you smell the slightest smell of rottenness, the product must be disposed of immediately.
How to check the freshness of an egg at home
There are several proven ways to determine the freshness of a product without opening the shell, which are based on the physical properties of the contents. The simplest and most reliable method is the water test. As over time, the air chamber inside the blunt end of the egg increases and the moisture evaporates, the density of the product changes.
To carry out the test, pour water into a transparent glass and carefully lower the egg into it. If it sank to the bottom and lies horizontally, you have an absolutely fresh product, no more than 3-4 days old. If the blunt end rises up and the egg stands vertically at the bottom, it is about 1-2 weeks old, and it is better to use it for heat treatment.
An egg that has floated to the surface should absolutely not be eaten, since gases have accumulated inside - the result of the activity of putrefactive bacteria. You can also use the candling method: a fresh egg, when viewed in the light (for example, through a smartphone screen or a lamp), looks uniform, without dark spots and blood inclusions.
☑️ Checking the freshness of the egg
⚠️ Attention: If, when breaking an egg, you feel a sharp unpleasant odor, and the protein spreads easily, like water, and does not hold its shape, the product is spoiled and dangerous for health.
Features of storing quail and other types of eggs
Quail eggs are often considered healthier and safer than chicken eggs due to the bird's higher body temperature, which supposedly kills salmonella. However, this does not mean that they do not spoil. Thanks to a thicker shell film, quail eggs can be stored in the refrigerator longer than chicken eggs - up to 60 days in raw form.
However, the hygiene rules remain the same for all types of bird eggs. Goose and duck eggs have more porous shells and are more susceptible to bacterial penetration, so their shelf life in the refrigerator is limited to 14 days. Ostrich eggs, due to their gigantic size and thick shell, can remain in the cold for up to 3 months, but after opening they need to be used at a time or very quickly.
When buying eggs from other birds, pay attention to the cleanliness of the shell: the presence of droppings or feathers may indicate a violation of sanitary standards on the farm, which shortens the actual shelf life. Always wash your hands after handling raw eggs of any bird to avoid cross-contamination.
Why are quail eggs less likely to be contaminated with salmonella?
Quails have a body temperature of about 42°C, which is fatal to most strains of salmonella. However, this does not give a 100% guarantee, since bacteria can get on the shell from the external environment.
Is it possible to freeze eggs and how to do it
Freezing is a great way to extend the shelf life of eggs if you have a large supply. However, you cannot freeze them in the shell: at low temperatures, the liquid inside will expand and burst the shell. The correct algorithm of actions involves removing the contents, lightly beating and placing in airtight containers.
Frozen egg mass can be stored in the freezer at a temperature of -18°C for up to 10-12 months. For ease of use, you can freeze the whites and yolks separately, adding a pinch of salt or sugar to the yolks (depending on further use) to prevent them from turning into a gel when defrosting.
The product should be defrosted slowly, in the refrigerator, and used immediately after thawing for baking or preparing dishes that require full heat treatment. It is better not to eat eggs raw after freezing.
Frequently asked questions about storing eggs (FAQ)
Is it possible to store eggs at room temperature?
Yes, unwashed eggs can be stored at room temperature (not higher than 20°C) for up to 25 days. However, in summer or in hot rooms the period is reduced to 7-10 days. In the refrigerator, the product lasts much longer and is safer.
What to do if there is a crack in the shell?
Eggs with a cracked shell cannot be stored, as bacteria will immediately penetrate inside. Such an egg should be immediately used for preparing dishes with full heat treatment (for example, baking a pie) or thrown away if there is any doubt about its freshness.
Why did the yolk of a boiled egg turn gray?
A greenish-gray coating on the yolk occurs when the egg is digested. This is the result of the reaction of sulfur from the white and iron from the yolk. Such an egg is safe for consumption, but may have a less pleasant taste and smell.
How to properly wash eggs before storage?
Washing eggs before storage is not recommended. If the shell is very dirty, wipe it with a dry cloth. Washing destroys the protective layer and the shelf life is sharply reduced. Wash eggs only with warm water and soap immediately before breaking.