What is hydrogen peroxide
The scientific name for hydrogen peroxide is hydrogen peroxide, and its molecule is made up of two hydrogen atoms and two oxygen atoms. The chemical formula is H2O2, from which it can be seen that there is one more oxygen atom in the molecule than in the water molecule. Hydrogen peroxide is a colorless liquid with a *** odor. 3% hydrogen peroxide is commonly used to disinfect wounds or otitis media.
3% hydrogen peroxide has the ability to disinfect and sterilize! Because peroxide is unstable, the following reactions can easily occur:
H2O2→H2O+(O)
When it meets with wounds, pus, or dirt of the skin, mouth, and mucous membranes, it immediately decomposes to produce oxygen. This oxygen atom, which has not yet combined into an oxygen molecule, has a strong oxidizing ability, and when it comes into contact with bacteria, it can destroy the bacterial organism and kill the bacteria.
The remaining material after killing bacteria is water without any toxicity or *** effect. It will not form a secondary pollution. Therefore, hydrogen peroxide is the ideal disinfectant for wound disinfection. However, you can not use a large concentration of hydrogen peroxide for wound disinfection to prevent burns to the skin and the affected area.
What is hydrogen peroxide
Hydrogen peroxide, chemical formula for H2O2, its aqueous solution is commonly known as hydrogen peroxide, the appearance of colorless transparent liquid, is a strong oxidizing agent, suitable for wound disinfection and environmental, food disinfection.
Melting point (℃): -0.89 ℃ (anhydrous)
Boiling point (℃): 152.1 ℃ (anhydrous)
Acids and bases
H2O2 is a binary weak acid with acidic properties. [4]
Oxidizing
Strongly oxidizing H2O2+ 2KI + 2HCl ==== 2KCl + I2+ 2H2O
2Fe2+ + H2O2+ 2H+ ==== 2Fe3+ + 2H2O
H2O2+ H2S ==== S↓+ 2H2O H2O2+ SO2==== H2SO4
Note: In acidic conditions the reduction product of H2O2 is H2O, in neutral or alkaline conditions its reduction product is hydroxide.
What is the concentration of hydrogen peroxide
Hydrogen peroxide concentration, which refers to the ratio of hydrogen peroxide to water, is generally not used for pure hydrogen peroxide (the concentration is a constant).
Hydrogen peroxide has oxidizing and reducing effects in different situations. Used for photographic stain remover; color positive film blue thinning; soft film over the proportion of thinning and so on. Extremely easy to decompose, not easy to store for a long time.
On October 27, 2017, the World Health Organization's International Agency for Research on Cancer published a preliminary collation of the list of carcinogens for reference, hydrogen peroxide is in the list of category 3 carcinogens.
Extended information:
Chemical Role:
The chemical industry is used as raw material for the production of sodium perborate, sodium percarbonate, peroxyacetic acid, sodium chlorite, thiourea peroxide, etc., and as oxidizing agent for tartaric acid and vitamins. Pharmaceutical industry as a fungicide, disinfectant, and the production of fumonisin insecticide and 40l antimicrobial oxidant. Printing and dyeing industry as a bleaching agent for cotton fabrics, reducing the color after dyeing.
Used in the production of metal salts or other compounds to remove iron and other heavy metals. Also used in electroplating solution, can remove inorganic impurities, improve the quality of plated parts. It is also used for bleaching of wool, raw silk, ivory, pulp and fat. High concentrations of hydrogen peroxide can be used as rocket power accelerant.
Search Encyclopedia - Hydrogen Peroxide Concentration
Search Encyclopedia - Hydrogen Peroxide
What is hydrogen peroxide?
Hydrogen peroxide
Hydrogen peroxide that is hydrogen peroxide (hydrogen peroxide)
1. Molecular Formula: H2O2
2. Relative molecular mass: 34.01
3. Main components: 30% H2O2
4. Appearance and Properties: colorless and transparent liquid, with a slight special odor.
5. Physical and Chemical Properties:
(1) Melting Point (℃): -2
(2) Boiling Point (℃): 158 (anhydrous)
(3) Relative Density (water=1): 1.46
(4) Relative Density (air=1): no information
(5) Solubility: soluble in water, alcohol, ether, insoluble in benzene, petroleum ether
(5) Solubility: dissolved in water, alcohol, ether, insoluble in benzene, petroleum ether
(6) soluble in water and alcohol, ether, insoluble in benzene. Petroleum ether
(6) Stability: unstable, keep away from light
(7) Conditions to avoid contact (contraindications): strong acids, strong bases, acyl chlorine, alcohols, amines, flammable or combustible.
6. Health Hazards
(1) Route of Invasion: Inhalation, Ingestion
(2) Health Hazards: Inhalation of vapors or mists of this product has a strong respiratory tract. Direct eye contact with the liquid can cause irreversible damage or even blindness. Oral poisoning appears abdominal pain, chest pain, dyspnea, vomiting, momentary motor and sensory disorders, elevated body temperature and so on. In some cases, visual disturbances, epileptic spasms and mild paralysis may occur. Prolonged exposure to this product may cause contact dermatitis. Skin contact, epidermal whitening, shedding, burning sensation.
7. First aid measures:
(1) Skin contact: Immediately remove contaminated clothing, rinse with plenty of running water for at least 15 minutes. Seek medical attention .
(2) Eye contact: Immediately lift the eyelids and flush thoroughly with plenty of running water or saline for at least 15min.
(3) Inhalation: Remove from the scene to fresh air. Keep the airway open. If breathing is difficult, give oxygen. If breathing stops, immediately carry out artificial respiration. Medical attention.
(4) Ingestion: Rinse mouth with water and give milk or egg white. Get medical attention.
8. Protective Measures:
Respiratory Protection: Wear a self-absorbing filtering gas mask (full face shield) when you may come into contact with the vapors.
Eye protection: Respiratory protection is already provided.
Body protection: wear a polyethylene hazmat suit.
Hand protection: wear neoprene gloves.
What is hydrogen peroxide? What are its properties? Is there anything similar?
Properties of hydrogen peroxide
Hydrogen peroxide, the scientific name of hydrogen peroxide, is a colorless, transparent liquid, soluble in water, alcohol and ether, corrosive in high concentrations, gradually decomposed into oxygen and water when placed.
30% hydrogen peroxide density is 1.11g/㎝3, melting point -0.89, boiling point is 151.4. molecular formula H2O2, molecular weight: 34.01.
Bleaching and sterilization effect is strong, and the effect is stronger under alkaline condition.
Hydrogen peroxide stability
Hydrogen peroxide can be catalyzed decomposition, decomposition is an exothermic reaction, at the same time produce gas.
2H2O2 (liquid) -→ 2H2O (liquid) + O2 (gas)
2H2O2 (gas) -→ 2H2O (gas) + O2 (gas)
Factors affecting the decomposition of hydrogen peroxide are mainly: temperature, pH and catalytic impurities.
1. Temperature:
H2O2 at lower temperatures and higher purity or more stable. Pure H2O2 decomposes violently and explosively if heated to 153 .C or higher. Decomposition at lower temperatures proceeds smoothly: 2H2O2-→2H2O + O2↑ +46.94kcal.
2.PH:
The acidity or alkalinity of the medium has a great influence on the stability of H2O2. Under acidic conditions H2O2 is stable and undergoes oxidation slowly; in alkaline media, H2O2 is very unstable and decomposes rapidly.The reaction rate of H2O2 as an oxidizing agent is usually fast in alkaline solutions. Therefore, heating the alkaline solution can destroy the excess H2O2 completely.
3. Impurities:
Impurities are important factors affecting the decomposition of H2O2. Many metal ions such as Fe2+, Mn2+, Cu2+, Cr3+, etc. can accelerate the decomposition of H2O2. Industrial grade H2O2 contains more metal ions impurities, must be added to a larger number of stabilizers to inhibit the catalytic effect of impurities, the principle is reduction and complexation.
4. Light:
The wavelength of 3200-3800A light can also make H2O2 decomposition speed up.
In order to stop the decomposition of H2O2, it is necessary to propose measures for the four major factors: heat, light, PH, and metal ions.
Hydrogen peroxide storage and transportation
◆ Storage
H2O2 should be stored in a cool, ventilated warehouse, avoiding direct sunlight;
It is strictly prohibited to mix with alkali, metals and metal compounds, flammable products;
The container should be capped and kept vented to maintain the purity of the H2O2 in the container and to prevent contamination;
In case of container is ruptured or leaking, it should be flushed with plenty of water.
Under the conditions of storage and transportation, the concentration should not decrease by more than 3% of the original concentration within one year.
Do not touch it with your hands directly, you should wear plastic gloves for the operation;
If it is touched accidentally or leaked from the package, please flush it with water.
Hydrogen peroxide safety information
◆ Toxicity
H2O2 is non-toxic in a general sense, it has a *** effect on the skin, eyes and mucous membranes, and can produce bleaching and burning sensation when the concentration is low, and blistering of the epidermis and serious damage to the eyes when the concentration is high. When the vapor enters the respiratory system, it can *** the lungs, and even lead to serious organ damage. When H2O2 stains the human body or splashes into the eyes, it should be flushed with a lot of water.
Flammability:
Any concentration of H2O2 is not flammable, but it is a strong oxidizer, especially when the concentration is high, it is easy to cause other combustible substances to burn. the process of H2O2 caused by combustion is a combination of decomposition and oxidation. the higher the concentration of H2O2, the easier the start of the combustion. When the spillage of H2O2 and combustible substances in contact, should be immediately diluted with a large amount of water rinse, and wash away the H2O2.
Explosive:
H2O2 can be decomposed in the presence of catalytic impurities, releasing oxygen and heat, the higher the temperature and concentration, the faster the decomposition, so once the decomposition is induced, the decomposition is accelerated with the exothermic and the temperature rise on its own, and as a result of the further increase in the temperature of the material, and produce more gases (oxygen and evaporated vapors), and with the temperature rise and expansion, at this time, if the If the container is closed, high pressure will be generated, resulting in container burst. Therefore, the storage of H2O2 equipment should be dust vents, in order to safely release the gas that may be generated. H2O2 solution at room temperature and pressure will not generally explode, but the decomposition of H2O2 produced by the oxygen under certain conditions can also be combustible vapors or gases to form explosive mixtures, this mixture is triggered (such as sparks, static electricity, etc.) that is, there is a risk of explosion.
What is the role of hydrogen peroxide?
Hydrogen peroxide is the common name for hydrogen peroxide solution. Hydrogen peroxide is a colorless and odorless liquid. At present, the usual hydrogen peroxide, there are three main categories: one type of household type, one type of medical type, and another type of industrial use. It is different is the concentration of hydrogen peroxide is not the same, in the hospital to use the concentration of some higher, to use some relative protection measures, household type of concentration is lower, maybe the effect is slower, but safer. The peroxide can be added to food to decompose and release oxygen, bleaching, antiseptic and deodorization.
Hydrogen peroxide can be used for bleaching of fabrics, pulp, grass, bamboo products, organic synthesis and polymer synthesis, the production of organic and inorganic peroxides, electroplating industry, three waste treatment, food, pharmaceutical industry, and so on.
It doesn't say that they can't be used together, just in medicine, they all have a disinfectant effect, there is no need to use them together.
It doesn't say you can't use them together.