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Hydrogen Peroxide Expiration Effects
On the influence of hydrogen peroxide expiration
Hydrogen peroxide is also a commonly used chemical agent in the world. It is active and useful in many fields. However, after it expires, it changes a lot and cannot be ignored.
Changes in chemical properties
After hydrogen peroxide expires, its chemical stability is greatly reduced. The original hydrogen peroxide, with a chemical formula of $H_2O_2 $, can slowly decompose into water and oxygen under normal conditions, but after it expires, the decomposition rate is accelerated. Due to different storage conditions, or affected by factors such as temperature, light, impurities, etc., the chemical bonds in hydrogen peroxide molecules are more prone to fracture. Impurities such as metal ions can be used as catalysts to accelerate their decomposition, causing a large amount of oxygen to escape, the content of active components of hydrogen peroxide is sharply reduced, the proportion of active oxygen species is unbalanced, and the chemical properties are greatly changed.
Changes in functional uses
In the medical field, hydrogen peroxide is often used as a disinfectant and bactericide to kill bacteria, viruses and other microorganisms with its oxidative properties. However, after expiration, its oxidative properties are weakened, and the efficacy of disinfection and sterilization is also reduced. For example, when treating wounds, expired hydrogen peroxide is difficult to be effective, or causes the growth of bacteria, which affects wound healing. In industrial applications, hydrogen peroxide is often used for bleaching, sewage treatment, etc. After the expiration date, the bleaching power is insufficient, and the oxidative decomposition effect of pollutants in the sewage is not good, which cannot meet the expected treatment standards, which affects the industrial production process and product quality.
Safety concerns
After the expiration date of hydrogen peroxide, a large amount of oxygen is generated due to decomposition. If the storage container is sealed too tightly, the gas accumulation will cause the pressure in the container to rise, and there is a risk of explosion. And the decomposition products or react with the container material, causing corrosion of the container, and then leakage. Although the concentration of the leaked hydrogen peroxide may have been reduced, it is still corrosive. Contact with skin, eyes, etc., can cause burns, tingling, and endanger personal safety. If it is accidentally inhaled, its volatile aerosol will also cause irritation to the respiratory mucosa, causing symptoms such as cough and breathing difficulties.
In summary, after hydrogen peroxide expires, its chemical properties, functional uses, and safety all change significantly. Therefore, when using hydrogen peroxide, it is necessary to pay attention to its shelf life and store it properly to ensure its stable performance and play its due role, while avoiding various risks caused by expired use.
Hydrogen peroxide is also a commonly used chemical agent in the world. It is active and useful in many fields. However, after it expires, it changes a lot and cannot be ignored.
Changes in chemical properties
After hydrogen peroxide expires, its chemical stability is greatly reduced. The original hydrogen peroxide, with a chemical formula of $H_2O_2 $, can slowly decompose into water and oxygen under normal conditions, but after it expires, the decomposition rate is accelerated. Due to different storage conditions, or affected by factors such as temperature, light, impurities, etc., the chemical bonds in hydrogen peroxide molecules are more prone to fracture. Impurities such as metal ions can be used as catalysts to accelerate their decomposition, causing a large amount of oxygen to escape, the content of active components of hydrogen peroxide is sharply reduced, the proportion of active oxygen species is unbalanced, and the chemical properties are greatly changed.
Changes in functional uses
In the medical field, hydrogen peroxide is often used as a disinfectant and bactericide to kill bacteria, viruses and other microorganisms with its oxidative properties. However, after expiration, its oxidative properties are weakened, and the efficacy of disinfection and sterilization is also reduced. For example, when treating wounds, expired hydrogen peroxide is difficult to be effective, or causes the growth of bacteria, which affects wound healing. In industrial applications, hydrogen peroxide is often used for bleaching, sewage treatment, etc. After the expiration date, the bleaching power is insufficient, and the oxidative decomposition effect of pollutants in the sewage is not good, which cannot meet the expected treatment standards, which affects the industrial production process and product quality.
Safety concerns
After the expiration date of hydrogen peroxide, a large amount of oxygen is generated due to decomposition. If the storage container is sealed too tightly, the gas accumulation will cause the pressure in the container to rise, and there is a risk of explosion. And the decomposition products or react with the container material, causing corrosion of the container, and then leakage. Although the concentration of the leaked hydrogen peroxide may have been reduced, it is still corrosive. Contact with skin, eyes, etc., can cause burns, tingling, and endanger personal safety. If it is accidentally inhaled, its volatile aerosol will also cause irritation to the respiratory mucosa, causing symptoms such as cough and breathing difficulties.
In summary, after hydrogen peroxide expires, its chemical properties, functional uses, and safety all change significantly. Therefore, when using hydrogen peroxide, it is necessary to pay attention to its shelf life and store it properly to ensure its stable performance and play its due role, while avoiding various risks caused by expired use.
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