Ecology of life: We all know that some things have a strictly defined expiration date, and its violation can cause serious harm to human health. But there are also non-obvious items and products that we encounter daily, but at the same time we don’t even think about the fact that they also have a limited shelf life.

We all know that some things have a strictly defined expiration date, and its violation can cause serious harm to human health.

But there are also non-obvious items and products that we encounter daily, but at the same time we don’t even think about the fact that they also have a limited shelf life.

Running shoes

When deciding on the need to buy new sports shoes, we most often focus on the fact that the old pair of sneakers has worn out or looks bad.

But few people think that even if the sneakers look well-preserved, they still could have lost their “sporty” shape. And this is especially important for running shoes.

As studies show, after an average of 500 kilometers, sneakers lose their shock-absorbing properties, which means that there is an excessive load on the joints.

Dmitry Krasnoyarov, product manager of the "Shoes" direction of the company "ANTA RUS":

Of course, there is a direct effect of wear on the shock-absorbing properties of any shoe, and even more so sports shoes. With constant use, any technology loses its original properties. Professional athletes usually have over ten pairs in their stock. The influence of weather conditions, types of surface, as well as many other factors determine the choice of the athlete in favor of the appropriate model.

It is impossible to completely eliminate stress on the joints, but with the help of advanced technology it can be significantly reduced. For example, already now there are innovative materials that have durability and wear resistance. Such shoes, if used by a non-professional, can be changed no more than once every three years.

Potato

At first glance, it seems that everything is simple and clear with potatoes: if it has not deteriorated, then you can eat it. But in fact, everything is much more complicated and serious.

Potatoes may contain a substance harmful to humans: the toxic chemical solanine. Ordinary potatoes contain its minimum amount and it does no harm to anyone.

But potatoes that have been stored for a long time have begun to turn green or sprout. In the "old" potato, the level of solanine rises so much that it already becomes dangerous for human health.

Solanine is an alkaloid of plant origin, which is formed in potatoes and other plants of the nightshade family (eggplant, tomato, pepper, tobacco) together with chlorophyll when the plant is exposed to light. Thus, plants are protected from insects and animals. But solanine can also be dangerous for people.

If the potato “turned green” by less than a quarter, then there will be no great harm to the body from eating it, but such potatoes need to be peeled by cutting off a thicker layer of the peel, since the main concentration of solanine is in it. So that solanine does not form in potatoes, it must be stored in places without access to light.

Network filters and voltage stabilizers

One of the most unexpected things on our list is surge protectors and stabilizers. They are designed to work under a certain load and can only pass a limited number of Joules through themselves, after which they begin to fail.

This is especially dangerous because the operation of power filters that have exhausted their service life can result in a fire.

Ilya Sukhanov, expert of the portal Roskontrol.rf, head of the testing laboratory:

Any surge protector or just an extension cord is designed to transfer a certain current, which is indicated in Amperes. This parameter depends on the cross-section of the wires, as well as the cross-section and material of the current-carrying plates. With a significant (more than 10-20%) and long-term (over 5-10 minutes) excess of the declared value, the product may melt or ignite, creating a fire hazard.

In high-quality network filters, everything will be limited to the operation of overload protection. But inexpensive Chinese filters and extension cords rarely even withstand the declared values, so they should be operated with an “underload” of 20-30%, or better just not to buy.

Spices

We are all used to storing jars of spices for years and changing them only when this or that seasoning is over. And very in vain!

Spices have a shelf life, which most often does not exceed two years. And for ground spices, it is even shorter. Studies have shown that after 6 months, ground spices lose their taste and aroma.

Tip: give preference to spices that are stored whole. You can always grind them yourself. This is especially true of pepper, cinnamon and coriander.

Hydrogen peroxide

Hydrogen peroxide is a mandatory component of any, even the simplest first aid kit. And, of course, we do not open a new vial of peroxide every time, but use a started vial.

And here is and in vain! After opening, the vial of peroxide retains its medicinal properties for no longer than two months, and then turns into ordinary water.

Damir Yarlushkin, expert of the portal Roskontrol.rf:

In everyday life, 3% hydrogen peroxide, which has bactericidal properties, is mainly used, which is sold in pharmacies. This liquid, which has the formula H2O2, is essentially water to which an additional oxygen atom is added during the electrolysis of sulfuric acid (and some other methods). This oxygen atom is where the power of hydrogen peroxide lies. It is called "active" or "atomic" oxygen: it is the component that, when hydrogen peroxide is applied, detaches from the molecule and does its job, killing bacteria.

However, the H2O2 hydrogen peroxide molecule is very unstable, so it must be stored in a dark place and in a hermetically sealed container. The energy of a quantum of daylight is enough to “break down” a peroxide molecule into water and oxygen. And in the open air, decomposition occurs even faster than in the light: upon contact with air, atomic oxygen simply “evaporates”, combining with atmospheric oxygen, and ordinary water remains in the bubble.

The difference between the expiration date, storage, sale

GOST R 51074-2003“Food products. Information for the consumer. General Requirements” contains clear and understandable information on this topical issue. So:

Shelf life: The period during which the food product, under the established storage conditions, retains the properties specified in the regulatory or technical document. Expiration of the shelf life does not mean that the product is not suitable for its intended use.

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Shelf life: The period after which a food product is considered unsuitable for its intended use.

Implementation period: The period during which a food product may be offered to the consumer. published

Hydrogen peroxide (peroxide) is environmentally friendly chemical used for oxidation reactions, bleaching processes, waste water treatment, exhaust air treatment and for various disinfection applications.

Decomposing to yield only oxygen and water, hydrogen peroxide is one of the purest and most versatile chemicals available. We will talk about what hydrogen peroxide has in the article.

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If you want to know how to solve exactly your problem - contact the online consultant form on the right or call free consultation:

You can find out about the shelf life of potassium permanganate from ours.

Does he exist?

Does hydrogen peroxide have an expiration date?

Hydrogen peroxide is available to the consumer in pharmacies as a 3 or 5 percent aqueous solution.

This is, in fact, the only disinfectant consisting solely of water and oxygen.

Hydrogen peroxide is often regarded as the true "green chemical". When H2O2 reacts with organic material, it breaks down into oxygen and water, which is not toxic for general use.

Peroxide and more concentrated perhydrol are easily decomposed, therefore they have a certain shelf life, taking into account the impact of external factors on it.

According to GOST

Hydrogen peroxide is found in many households with low concentrations(3-9%) for disinfections and some cosmetic procedures. For medical purposes and industry, perhydrol is used in more than high concentrations(33-38% and more).

Storage features

The shelf life of hydrogen peroxide is affected by the material from which the container for the content of H2O2 is made.

The product is available in dark glass containers or opaque polyethylene bottles - this the most suitable materials for storage.

The higher the percentage of hydrogen peroxide, the more carefully you need to consider the storage conditions of the product.

The property of a substance to decompose in the presence of certain active impurities, with the formation of gaseous oxygen and water, is an important factor for proper storage facilities.

Peroxide should be stored in a dark, cool place, protected from UV rays. A container of more than two hundred milliliters is not hermetically clogged.

3% and 6% solution

Hydrogen peroxide, which is in almost every home first aid kit, should be kept in a dark place, at a temperature no higher than 23 degrees. Sealed peroxide is best stored in the refrigerator, including an already opened bottle.

From the moment the container with the solution is opened, the peroxide is good for another 30-45 days.

Do not contaminate the solution by dropping the soiled swabs into the container. Upon contact with foreign objects, as well as upon reaction with oxygen, the peroxide will begin to decompose, and will soon be completely useless for further use.

33% and 38% perhydrol

Despite its high reactivity, perhydrol is a stable substance, and when kept under optimal conditions, can be stored for many years.

The most important factors increasing the rate of decomposition, are:

• high pH value;
• high temperatures;
• direct sunlight;
• the presence of transition metal salts and all kinds of impurities.

Perhydrol - very powerful oxidizing agent and if mishandled can be severely corrosive to the skin, eyes and respiratory tract. Hydrogen peroxide must be protected from all types of contamination.

1. Perhydrol is kept in the original container. It is not allowed to put anything inside the container with the solution - this reduces the risk of contamination.
2. The substance is stored in a place protected from light and heat. When stored for a long time in the light, H2O2 decomposes and loses its properties.
3. Perhydrol should keep away from organic compounds, combustible mixtures and heavy metals (iron, copper, manganese, nickel, chromium).
4. When the content of the solution in the fridge the container must have a clearly marked label so as not to confuse it with water.

How to understand that the cement has expired? find out right now.

How to check for suitability?

Whether the hydrogen peroxide bottle is open or not, the process of breaking it down into water and oxygen always goes: 2 H 2 O 2 → 2 H 2 O + O 2 (g).

Even in a closed container, the process of gas formation occurs, but the reaction proceeds much more slowly than when the substance comes into contact with a cut or other surface.

Gas formation reactions, that is, the appearance of bubbles, contribute to transition metals such as the presence of iron in the blood.

If you are not completely sure about the suitability of H2O2, there is a safe way to check this. It is enough to sprinkle a little peroxide into the sink or onto a potato slice.

If the solution "hisses", then the product is suitable for further use. There are no bubbles - it's time to replace the bottle.

Not worth it open the container with the substance in advance and pour H2O2 into another container, especially from transparent glass.

Why is it dangerous to use an expired one?

The danger of an expired substance is senselessness of its application.

When a bactericidal agent is urgently needed, and a useless liquid is used instead, then this will not bring any benefit, except harm.

If you find a bottle of peroxide in your first aid kit that has been stored there for a long time, look at date of manufacture and check the substance for suitability. Maybe it's time to replace it?

Which package of hydrogen peroxide to choose? Learn about it from the video:

is an environmentally friendly chemical preparation that is used in the reactions of oxidation, bleaching, purification of water and air and disinfection in its various forms. It decomposes into oxygen and water, thereby being a pure and versatile chemical. But is there an expiration date for hydrogen peroxide? Peroxide is available for sale in pharmacies at a concentration of 3 and 5 percent solution.

When a "Green Chemical" reacts with organic material, the former breaks down into constituents that have no toxicity in general use.

Regardless of the concentration of the agent, the decomposition process occurs easily and quickly, which is why the drug in question has an expiration date.

GOST requirements

H 2 O 2 with a low concentration is available in almost every one of us at home. It is used for disinfection, cleaning or cosmetic procedures. For medical purposes and industrial production, perhydrol is used at a concentration of 30 to 40%.

• 3 and 5 percentage concentrations are suitable for use within 12-36 months, provided that the container in which the product is stored is closed. If its integrity has been violated, then the drug will be effective for a month and a half. Based on the requirements of GOST, a given concentration of hydrogen peroxide has a shelf life (with closed packaging) - 2 years, after opening - 30 days. If a solution was prepared using the substance in question, then its shelf life should not exceed one light day.
• High concentrations (30%-40%) have strong oxidizing properties and can be very dangerous if the perhydrol is not properly stored or safety precautions are violated. Based on the requirements of GOST, the shelf life of such a concentration should not exceed 6 months from the date of production. If any solution was prepared, then its shelf life is 1 day.

Storage Features

Depending on the packaging, hydrogen peroxide may have a different expiration date. That is why those containers in which the substance is sold in pharmacies - dark glass and polyethylene opaque white bottles - are the safest and most correct.

Attention! The higher the concentration of perhydrol, the more attentive it is to the requirements for its storage.

The product in question has properties to decompose due to the influence of certain impurities on it. As a result, gaseous oxygen and water are formed.

Small concentrations of peroxide are kept in dark and dry places at a temperature not exceeding 23 degrees. The safest place is the refrigerator, whether the bottle is open or not.

After a leak, hydrogen peroxide can have a positive effect for another month or a half.

High concentrations of the substance can be stored for several years, despite the high reactivity.

The most important factors that can accelerate the rate of decomposition include:

• High pH
• Elevated temperatures
• Direct exposure to UV rays
• The presence of transition metal salts and other unnatural impurities in the solution.

The last point is especially important: being a powerful oxidizing agent, perhydrol can easily corrode the skin, eyes and mucous membranes. That is why it is necessary to protect the product from any contamination.

If hydrogen peroxide is stored in its original container, the solution will be suitable for a long time without significant losses in oxygen. For this you need:

• Have the original container from the manufacturer. There should be nothing inside except the product itself
• The storage place must be protected from the penetration of any kind of light and must not be heated. If this rule is violated, then perhydrol will lose its properties.
• Ensure the remoteness of peroxide packaging from organic compounds, combustible mixtures, iron, copper, manganese, nickel and chromium
• Be sure to leave a label so as not to confuse the solution with water and be aware of the production time.

How to test for effectiveness

It doesn't matter if the bottle of peroxide is open or not, the process of its decomposition is always going on. However, without oxygen entering the container, this process takes longer than when the substance enters the open air.

Gas formation (formation of foam) is caused by metals. Have you ever noticed how hydrogen peroxide hisses when it hits bloody wounds?

If you are not sure about the suitability of perhydrol, there is an easy and safe way to test its effectiveness. To do this, sprinkle peroxide on the sink or slice of potatoes. If the gas formation process has begun, then the drug is suitable, but if the agent does not hiss, then this is a signal to change the bottle.

Spoiled perhydrol will not cause any harm, it alone will not provide a disinfecting, cleaning or bleaching effect.

Treatment with hydrogen peroxide Larisa Stanislavovna Koneva

STORAGE CONDITIONS FOR HYDROGEN PEROXIDE

Hydrogen peroxide gradually decomposes in the light, so it is recommended to store it in dark glass jars or in light glass dishes, but in a dark place. In this case, hydrogen peroxide will decompose slowly, at a rate of 1% per month, and will retain its qualities for 2 years. If you want to store hydrogen peroxide for a longer period, then place it in a refrigerator with a temperature below -0.5 ° C.

Terms and conditions of storage Medicines should be stored in a dry, cool, shady place, away from odorous substances. With proper storage, the shelf life of medicines is long: grains, tablets and powders - at least two years, alcohol solutions - for several years,

Hydrogen Peroxide Scheme Professor Neumyvakin proposed an oral hydrogen peroxide regimen that is excellent for the treatment of cardiovascular disorders. This peroxide regimen has been time-tested and, in my experience, gives excellent results.

Forms of release of hydrogen peroxide If you come to the pharmacy and ask for hydrogen peroxide, they will give you a bottle with a 3% solution without any questions. This is the so-called pharmacy concentration of peroxide, which is used in medicine. For greater stability of the solution in it

Intravenous Hydrogen Peroxide As I said, intravenous peroxide, as one of my correspondents did, must be done with extreme caution. Even the simple introduction of more familiar drugs into a vein requires special measures.

Oral use of hydrogen peroxide In his book, W. Douglas was very careful with the recommendations for the use of hydrogen peroxide orally. Although in other sources, including the Internet, you can find numerous references to the fact that drinking peroxide

The healing properties of hydrogen peroxide In this section I would like to tell you the cases known to me when hydrogen peroxide really helped in the treatment of various diseases. This includes personal experience, observations, letters from my readers, some facts from

CHAPTER I. STORAGE CONDITIONS OF SOUR CREAM Sour cream is quite fastidious in storage, in connection with this it is called a perishable product. We recommend storing it in a cool place, where the temperature ranges from -2 to +8 °C, if possible. Don't put it in the freezer

Conditions for storage and use of hydrogen peroxide It is better to store hydrogen peroxide in a dark container. However, practical experience with hydrogen peroxide shows that it boils at a temperature of 67 ° C, after which its qualities are preserved. Therefore, hydrogen peroxide

Dosage of hydrogen peroxide As a rule, the more acute the disease, the more peroxide is required for treatment. For example, if we are talking about the flu, then the daily dosage may be 250 ml of a 0.0375% hydrogen peroxide solution. Total of such intravenous

DESCRIPTION OF HYDROGEN PEROXIDE Hydrogen peroxide (H202) is a colorless transparent liquid with a pronounced bactericidal and sporicidal action. Hydrogen peroxide is produced in the form of 27.5–40% solutions (perhydrol), the working concentrations of which are 3–6%, and INTRODUCTION OF HYDROGEN PEROXIDE THROUGH THE NOSE Introduction of hydrogen peroxide through the nose can be successfully used for colds, inflammation of the nasopharynx, headache pain and many other ailments. Recipe Prepare a solution at the rate of 10 drops of hydrogen peroxide

Other scientific names for hydrogen peroxide: hydrogen dioxide, perhydrol, hydroperoxide, hydrogen peroxide. In everyday life, hydrogen peroxide is known to a large proportion of the population as a disinfectant and brightening agent for household needs. In fact, hydrogen peroxide is widely used in various industries such as chemical, medical, textile, paper and pulp, and even mining.

How to store hydrogen peroxide? Storage of hydrogen peroxide is preferably in a dark glass container. At the same time, researchers who conducted experiments on this substance found that the boiling point of hydrogen peroxide is 67 degrees Celsius, after which its inherent qualities are preserved.

Accordingly, storage in a transparent container will not harm the properties of this substance. That is why pharmaceutical companies pour and sell peroxide in transparent and opaque containers, in glass or plastic. Technical hydrogen peroxide used at the enterprise is stored outdoors in aluminum or plastic containers.

Transportation of such hydrogen peroxide is carried out in covered wagons by rail in specialized tanks. The air temperature in this case can be from -20 to +25 degrees. Protection from direct sunlight is provided by a canopy. The shelf life of technical hydrogen peroxide is not more than six months.

In a hydrogen peroxide molecule, the hydrogen and oxygen atoms are not located on the same line, but at right angles to each other. This causes the instability of the molecule, when it enters the air, the substance decomposes into oxygen and water. Therefore, when stored in industrial plants, stabilizers are added to peroxide canisters to prevent its rapid decomposition.

Although the properties of hydrogen peroxide are not lost under various conditions, storing hydrogen peroxide in a transparent or plastic container can reduce the shelf life of the drug. Therefore, to keep the peroxide for a long time, without reducing efficiency, follow the recommendations for the storage method.

Place the substance in a hermetically sealed container, closed, like many medicines, under two lids. Place in a dark, cool place, such as a closed cabinet where other medicines are stored. So you will avoid the decomposition of peroxide from contact with air and extend the shelf life to two years.

To avoid contact with air when using the drug, you can use the following method: take a syringe with a thin needle, unscrew the outer cap, pierce the inner stopper with the syringe needle and draw up the required amount of liquid. When using this method, the concentration of the substance will not be lost for a long period of time.