How to store concentrated hydrogen peroxide. Shelf life of hydrogen peroxide. Is there an expiration date

Hydrogen peroxide is a slightly viscous liquid that is colorless and odorless. In medicine, this substance is used as a disinfectant for the treatment of wounds of various origins. But, like any other medical product, peroxide has its own expiration date, which should certainly be taken into account when using it.

Hydrogen peroxide expiration date

The shelf life of hydrogen peroxide 3% depends on the method of its production, that is, factory or pharmacy. When manufactured at the factory, the shelf life of hydrogen peroxide is 2 years, and at the pharmacy - 15 days, according to clause 161 of Appendix 2 of the order of the Ministry of Health of the Russian Federation dated July 16, 1997 No. 214 "On quality control of medicines manufactured in pharmacy organizations (pharmacies)"

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The expiration date of hydrogen peroxide must be indicated on the packaging of the drug:

• A solution of 6% is stored in a dark place in a closed package at temperatures up to +25 degrees Celsius for 2 years
• Once opened, this solution will keep for 12 months.
• Peroxide working solution should be used within 48 hours

More about the concentration of working solutions:

1. The concentration of hydrogen peroxide in the working solution,
2. % Amounts of agent and water required for preparation

Hydrogen peroxide expiration date after opening

There is no regulatory documentation according to which it is possible to determine the shelf life of hydrogen peroxide after opening the package. But you must always remember that in an open vial, the active substance of the drug loses its properties, and thus hydrogen peroxide reduces its antiseptic effect.

In order to reduce the loss of the antiseptic effect, it is recommended to pack the drug in smaller containers at. It is also important to control the amount of the drug that is part of the drug. These requirements are approved by the order of the Ministry of Health of the Russian Federation dated July 16, 1997 No. 214.

Features of hydrogen peroxide:

1. Keeps bactericidal properties at freezing with the subsequent thawing.
2. The tool can be transported using any type of transport, subject to the temperature regime from -30 degrees Celsius to +30 degrees Celsius.
3. It is a safe disinfectant, which belongs to the IV class of low-toxic substances, the decomposition of which occurs during contact with air. This releases oxygen.
4. The bactericidal effect is achieved due to the formation of an intermediate product, namely the active hydroxyl radical.
5. The activity of the drug is aimed at the cytoplasmic membrane of bacteria and spore membranes, the oxidation of enzymes, proteins and peptides. This process is accompanied by lysis of microorganisms.
6. It is effective to use a solution of 6% hydrogen peroxide to disinfect contaminated surfaces with gram-positive and gram-negative bacteria, as well as mycobacteria, helminths, protozoa, tuberculosis pathogens, pathogenic fungi and viruses.
7. Disinfects the premises from the main protozoa, which are the source of candidiasis, dermatophytosis and conidia of pathogenic fungi that live in humid air.

and objects is carried out according to a special regime:

To learn more about this technique, you should refer to the document: "Guidelines for disinfection, pre-sterilization cleaning and sterilization of medical devices" (No. MU-287-113, approved by the Ministry of Health of the Russian Federation on December 30, 1998). Repeated disinfectant solutions must not be used.

For this, aerosol generators are used, on which special modes are set, which are prescribed in the relevant instructions for use.

• Walls, floors, furniture and other surfaces in the room are treated using rags that are moistened in a peroxide solution or irrigation is carried out from a hydro-panel or other sprayer.
• In the same way, they irrigate and wipe sanitary vehicles.
• Disinfection of linen is carried out at the rate of 4 liters of the product per kilogram of linen. After that, the linen is washed and rinsed with clean water.
• Dining and laboratory glassware is immersed in the solution at the rate of 2 liters of product per 1 set of dishes. After that, the dishes are washed with clean running water.
• Various patient care items, as well as toys, are disinfected with a rag soaked in a peroxide solution. Small objects are completely immersed in the solution, while large objects can be treated by irrigation. The final step is to rinse the items with water.
• Medical items are processed by complete immersion in the working solution. In this case, it is necessary to achieve complete filling of all cavities using a pipette or syringe. If the product can be disassembled into smaller parts, then this must be done. The solution layer above the objects should be at least 1 centimeter. After the end of the procedure, the items are thoroughly rinsed with running water:
  • when treated with a 3% peroxide solution - at least 3 minutes;
  • when treated with a 4-6% peroxide solution - at least 5 minutes;
  Dental impressions are disinfected by complete immersion in the working solution, while adhering to the modes suggested by the instructions. When finished, the impressions are washed with water.

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.

Antiseptic Hydrogen peroxide is available in 3 forms:

• Shelf life of 3% hydrogen peroxide solution for external and local use - 2 years .
• Shelf life Perhydrol - a solution of 35% hydrogen peroxide for breeding, subject to proper storage and integrity of the package - 6 months. Ready solution - no more than 24 hours.
• Shelf life Hydroperit- tablets for the preparation of a 35% solution - 2 years. Ready solution - no more than 24 hours.

On tablets, the expiration date is indicated on the blister. On solutions, it is stamped on the bottle and on the carton.

Under the influence of direct sunlight and in severe frost, the chemical elements of the preparations decompose and disappear, so the shelf life is reduced to 2-3 days.

Hydrogen peroxide can be used 5-10 days before the expiration date under proper storage conditions.

At the end of the period, Hydroperit begins to crumble, and perhydrol and 3% hydrogen peroxide solution evaporate.

Signs of expired or defective goods:

1. The integrity of the package or vial is broken.
2. No juice storage on packaging.
3. Traces of evaporation on the bottle.
4. Turbid solution.
5. Presence of sediment.

Hydrogen peroxide in any form can be used within a month after the expiration date, if the integrity of the package has not been violated. Diluted solutions should not be used after a day, since the active substances evaporate in the air, and the product will be useless.

A darkened bottle of a 3% solution and a dense package of Hydroperite protects Hydrogen Peroxide from evaporation and decay of active substances, this helps the antiseptic to be stored for quite a long time. Perhydrol is stored in transparent packaging, which significantly reduces the shelf life.

How to store at home

Hydrogen peroxide in any form release is stored in a dark place at a temperature not higher than +15 o C.

The antiseptic preparation should be stored in a tightly closed package in a specially designated first-aid kit that does not let light through. At temperatures exceeding those allowed for storage, hydrogen peroxide should be transferred to a shelf in the refrigerator door.

It is not necessary to pour the solution into another container. We allow this option only if the integrity of the package is damaged. It is necessary to find a container as close as possible to the original. When opening, indicate the date.

Do not store hydrogen peroxide:

• near heaters;
• when exposed to direct sunlight;
• in the freezer and main compartment of the refrigerator.

Hydrogen peroxide analogues:

• Chlohexidine;
• Antiseptic;
• Biosept;
• Bonaderm;
• Hydrogen peroxide;
• Ichthyol ointment;
• Cutasept;
• Myristamide;
• Septocid;
• Sterillium;
• Farmaseptil.

Rules for storing the drug in pharmacies and clinics

In accordance with the order of the Ministry of Health and Social Development of the Russian Federation N 706n "On Approval of the Rules for the Storage of Medicines", the antiseptic agent Hydrogen Peroxide should be stored:

1. A solution of Hydrogen Peroxide 3% and Pedhydrol is stored in refrigerators at a temperature not exceeding +15 ° C.
2. Hydoperite is placed in special cabinets on a shelf next to similar antiseptics.

According to SanPiN 2.1.7.2790-10, large batches of expired or defective goods are destroyed at manufacturing plants with a special license.

Small quantities of hydrogen peroxide are destroyed in pharmacies. The antiseptic is dissolved in water and poured out.

During transportation, antiseptic preparations must be packed in special containers where the required temperature and humidity are maintained. Carriers must be authorized and licensed to transport medicines. This is regulated by the Federal Law N61 "On the circulation of medicines" dated 04/12/2010.

Employees of pharmacies and clinics are responsible for the proper storage of antiseptics and medicines. In case of untimely disposal, employees may fall under administrative responsibility. In the case of the sale of deliberately stitched or defective goods, the criminal code comes into force.

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.

Potatoes

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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Best before date: 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

GOST 177-88

INTERSTATE STANDARD

HYDROGEN PEROXIDE

TECHNICAL CONDITIONS

Date of introduction 01.07.89

This standard applies to aqueous solutions of hydrogen peroxide obtained by the electrochemical method through persulfuric acid (medical and technical grade A) and by the organic method based on the liquid-phase oxidation of isopropyl alcohol (technical grade B).

This standard specifies requirements for hydrogen peroxide produced for the needs of a country's economy and for export.

Hydrogen peroxide is used in the chemical, pulp and paper, textile, medical and other industries.

Formula H 2 O 2.

Molecular weight (according to international atomic masses) 1985 - 34.0158.

The requirements of this standard are mandatory.

(Revised edition, Rev. No. 1, Amendment).

1. TECHNICAL REQUIREMENTS

1.1. Hydrogen peroxide must be manufactured in accordance with the requirements of this standard according to the technological regulations approved in the prescribed manner.

1.2. Depending on the purpose and methods of production, medical and technical hydrogen peroxide is produced in two grades: A and B.

1.3. Characteristics

1.3.1. In terms of physicochemical parameters, hydrogen peroxide must comply with the requirements and standards specified in the table.

Note. It is allowed to reduce the mass fraction of hydrogen peroxide during the warranty period of storage in a solution of medical hydrogen peroxide - 1.5%, technical - 2.5%.

1.3.2. It is allowed, in agreement with the consumer, to produce grade A hydrogen peroxide and medical hydrogen peroxide with a mass fraction of 27% - 40%.

Hazard class - 2 according to GOST 12.1.007.

1.4.4. Hydrogen peroxide solutions can cause skin and eye burns, hydrogen peroxide vapors can irritate mucous membranes.

1.4.5. When working with hydrogen peroxide, service personnel must be provided with special clothing, special footwear and personal protective equipment in accordance with applicable standards.

The frequency of sanitary and chemical control of the air in the working area is established by the bodies of the sanitary and epidemiological service and is carried out by the industrial sanitary laboratory in accordance with GOST 12.1.005.

1.5. Protection of Nature

Protection of the environment from the harmful effects of products used in the process of obtaining hydrogen peroxide must be ensured by careful sealing of process equipment.

Wastewater treatment from hydrogen peroxide is carried out by any method that ensures its decomposition.

1.6. Marking

Analyzed hydrogen peroxide volume (15± 0.5) cm 3 and distilled water with a volume (15± 0.5) cm 3 measured with a cylinder 2-50 according to GOST 1770 are placed in identical test tubes P1-14-120 XC or P1-16-150 XC according to GOST 25336 and compared in transmitted light.

The product complies with the requirements of this standard if it does not differ from distilled water.

3.3. Determination of the mass fraction of hydrogen peroxide

GOST 24104 * with the highest weighing limit of 200 g.

________

* Since July 1, 2002, GOST 24104-2001 has been put into effect (hereinafter).

Mechanical stopwatch or hourglass.

Flask Kn-1-250-24/29 TS, Kn-2-250-34 THS according to GOST 25336.

Cylinder 1-50 or 3-50 according to GOST 1770.

Burette 1-2-50-0.1, 2-2-50-0.1 or 3-2-50-0.1 according to GOST 29251.

Potassium manganese acid according to GOST 20490, x. h., h. d. a., concentration solution With(1/5 KMnO 4 ) \u003d 0.1 mol / dm 3 (0.1 n.); prepared according to GOST 25794.2.

Setting the titer (correction factor) of a solution of potassium permanganate concentration With(1/5 KMnO 4 ) \u003d 0.1 mol / dm 3 is carried out according to GOST 25794.2.

3.3.3. Conducting an analysis

0.1500 - 0.2000 g of hydrogen peroxide is placed in a 250 cm 3 conical flask containing 25 cm 3 of water, 20 cm 3 of a sulfuric acid solution, stirred and titrated with a solution of potassium permanganate until a pink color does not disappear within a minute. At the same time, a control experiment is carried out under the same conditions and with the same amount of reagents, but without the addition of hydrogen peroxide.

3.3.4. Results processing

Mass fraction of hydrogen peroxide (X) as a percentage is calculated by the formula

where V- the volume of the solution of potassium permanganate concentration With(1/5 KMnO 4 ) \u003d 0.1 mol / dm 3 spent on titration of the analyzed solution, cm 3;

V 1 - the volume of the solution of potassium permanganate concentration With(1/5 KMnO 4 ) \u003d 0.1 mol / dm 3 spent on titration of the control experiment, cm 3;

0.0017 - the mass of hydrogen peroxide, corresponding to 1 cm 3 solution of potassium permanganate concentration exactly With(1/5 KMnO 4 ) \u003d 0.1 mol / dm 3, g / cm 3;

K- titer (correction factor) of a solution of potassium permanganate concentration With(1/5 KMnO 4 ) \u003d 0.1 mol / dm 3 (0.1 n.);

t- weight of the sample, g.

The result of the analysis is taken as the arithmetic mean of the results of two parallel determinations, the absolute discrepancy between which does not exceed the allowable discrepancy equal to 0.10%.

Permissible absolute total error of the analysis result± 0.15% with a confidence level of 0.95.

3.4. Determination of the mass fraction of acids

Flasks Kn-1-100-14/23 TS, Kn-1-250-24/29 TS according to GOST 25336.

Cylinder 1-100 or 3-100 according to GOST 1770.

Burette 1-2-25-0.1; 1-2-10-0.05; 2-2-25-0.1; 3-2-25-0.1 or 4-2-25-0.1 according to GOST 29251.

Pipettes 2-2-10 or 3-2-10 according to GOST 29227.

Distilled water according to GOST 6709.

Sodium hydroxide according to GOST 4328, x. hours, concentration solution With(NaOH) \u003d 0.01 mol / dm 3 and With(NaOH) \u003d 0.1 mol / dm 3.

Methyl red (water soluble indicator).

Methylene blue (indicator).

Rectified technical ethyl alcohol in accordance with GOST 18300.

3.4.2. Preparation for analysis

3.4.2.1. Mixed indicator preparation

0.10 g of methylene blue are placed in a flask and dissolved in 100 cm 3 of ethyl alcohol. Separately dissolve 0.20 g of methyl red in 100 cm 3 of ethyl alcohol. Both solutions are mixed. Violet color corresponds to acid reaction, green color corresponds to alkaline reaction, greenish-blue color corresponds to neutral reaction.

General purpose laboratory scales of the 2nd accuracy class according to GOST 24104 with the maximum weighing limit of 200 g.

Cylinder 1-50 or 3-50 according to GOST 1770.

Platinum cup according to GOST 6563, product 115-4 or 115-5, 118-4 or 118-5 with a capacity of 100 to 200 cm 3.

Drying cabinet SNOL 25.2.5.2.5/2M or any other, providing heating temperature (105 ± 5) °C.

Calcium chloride, calcined.

Bath water.

Distilled water according to GOST 6709.

3.5.2. Conducting an analysis

In a platinum cup, brought to constant weight, 50 cm 3 of water are placed in a cylinder and 10 cm 3 of hydrogen peroxide are added with a pipette. The decomposition of hydrogen peroxide is carried out at room temperature. After the end of the intensive decomposition of hydrogen peroxide, the cup is placed in a boiling water bath and evaporated to dryness. The residue is dried in an oven at a temperature of 105 - 110 ° C to constant weight, cooled in a desiccator and weighed. The weighing result is recorded to the fourth decimal place.

3.5.3. Results processing

Mass concentration of non-volatile residue (X 3 ), g / dm 3, calculated by the formula

where m- weight of residue after drying, g;

10 - the volume of the analyzed sample, cm 3 .

The result of the analysis is taken as the arithmetic mean of the results of two parallel determinations, the discrepancy between which does not exceed the allowable discrepancy, equal to 0.06 g/dm 3 .

Permissible total error of the analysis result is ± 0.03 g / dm 3 with a confidence level of 0.95.

Sodium hypophosphorous acid (sodium hypophosphite) according to GOST 200.

Mechanical stopwatch of the 2nd accuracy class with a measurement range from 0 to 30 minutes and an error of no more than ±0.6 s.

General purpose laboratory scales according to GOST 24104, 2nd accuracy class, with the maximum weighing limit of 200 g.

Flasks Kn-1-500-24/29, Kn-2-500-24 according to GOST 25336.

Glasses V-1-100 or H-2-100 according to GOST 25336.

Test tubes P-1-10-0.1 XC according to GOST 1770.

Pipettes 4-2-2 or 5-2-2; 6-1-5 or 7-1-5 according to GOST 29227.

Cylinders 1-50 or 3-50; 2-250 or 3-250 according to GOST 1770.

Bath water.

3.6.2. Preparing for Analysis

3.6.2.1. Preparation of a reagent for arsenic

20.00 g of sodium hypophosphite are placed in a flask and dissolved in 40 cm 3 of water. 180 cm 3 of hydrochloric acid are added to the solution and left to stand for a day. When the precipitated crystals of sodium chloride precipitate, the liquid is drained, leaving a precipitate. The solution should be colorless and stored in a vial with a ground stopper.

3.6.3. Conducting an analysis

5 cm 3 of hydrogen peroxide are added to a glass with a capacity of 100 cm 3, 2 cm 3 of a sulfuric acid solution are added, mixed and evaporated on a hot plate with low heat until sulfuric acid vapor appears. Then the heating is stopped, cooled to room temperature, the walls of the beaker are rinsed with a small amount of water, stirred and the evaporation is repeated.

After cooling, the contents of the beaker are transferred to a test tube, the beaker is rinsed with 2 cm 3 of water, pouring the water into the same test tube, and 5 cm 3 of the reagent for arsenic are added. The tubes are placed in a boiling water bath and heated for 15 minutes.

Hydrogen peroxide is considered to comply with the requirements of this standard if, within 15 min, the contents of the tube do not turn brown or a brown precipitate forms.

3.7. It is allowed to use other measuring instruments (instruments, measuring utensils) with metrological characteristics and equipment with technical characteristics not lower than those indicated.

4. TRANSPORT AND STORAGE

By rail, hydrogen peroxide is transported per carload in covered railway cars, in aluminum vessels and containers - on platforms in accordance with the technical conditions for loading and securing cargo approved by the USSR Ministry of Railways, in special aluminum tanks of the sender - in accordance with the rules for the transportation of goods of the Ministry of Railways USSR.

Cargo places in railway cars should be placed and secured in accordance with the technical conditions for loading and securing cargo, approved by the Ministry of Railways of the USSR.

Hydrogen peroxide packed in bottles and barrels is transported in packages in accordance with the requirements of GOST 9570, GOST 21650, GOST 24597, GOST 26663.

It is allowed to transport the product in unpackaged form as agreed with the consumer, provided that the cargo is loaded and unloaded at the enterprise's access roads.

The ambient temperature during transportation of hydrogen peroxide is not limited.

(Revised edition, Rev. No. 1).

4.2. Hydrogen peroxide is stored in warehouses that provide protection from exposure to sunlight, at a temperature not exceeding 30 °C.

It is allowed to store hydrogen peroxide in open areas, equipped with a canopy that excludes direct sunlight, in storage tanks with an isothermal device that ensures the product temperature is not higher than 30 °C and not lower than minus 30 °C.

5. MANUFACTURER WARRANTY

5.1. The manufacturer guarantees the compliance of hydrogen peroxide with the requirements of this standard, subject to the conditions of transportation and storage.

5.2. Guaranteed shelf life of hydrogen peroxide is six months from the date of manufacture.

APPENDIX
Reference

Freezing point of aqueous solutions of hydrogen peroxide