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Basic knowledge of chlorine-containing disinfectants

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【Summary】Basic knowledge of chlorine-containing disinfectants

Basic knowledge of chlorine-containing disinfectants

【Summary】Basic knowledge of chlorine-containing disinfectants

  • Categroy:News
  • Author:
  • Origin:
  • Release Time:2020-05-21 11:39
  • Views:
Information

General can dissolve in water, produce chlorophyll acid disinfectant collectively containing chlorine disinfectant.

It is an old disinfectant, but it is still an excellent one.

The effective atmosphere in chlorine-containing disinfectant that says normally, not the content that points to chlorine, however the oxidation capacity of disinfectant, the oxidation capacity that is equivalent to how much chlorine.

 

The disinfectant can be divided into chlorination which is mainly chloral and inorganic chlorine which is mainly chlorophyll acid.

The former has slow bactericidal action but stable performance, while the latter has fast bactericidal action but unstable performance.

 

Common dosage forms:

 

  1. Liquid chlorine, containing more than 99.5% (V/V) of chlorine;

 

  1. Bleaching powder: effective chlorine 25% (W/W);

 

  1. bleaching powder essence: containing effective chlorine 80% (W/W);

 

d. 3 in 2, containing effective chlorine 56% (W/W);

 

e. sodium hypochondria, industrial preparation containing effective chlorine 10% (W/W);

 

f. hydrochlorofluorocarbon sodium, effective chlorine 60% (W/W);

 

g. Anachronistically acid, containing effective chlorine 85-90% (W/W),

 

h. sodium phosphate chloride, containing 2.6% available chlorine (W/W).

 

(1) sterilization principle: the sterilization mechanism of chlorine-containing disinfectant has three points:

 

a.Oxidation of secondary acid: chlorophyll acid is a very small neutral molecule;

It can spread to the surface of the bacteria with negative charge, and through the cell wall into the bacteria for oxidation, destroy the bacteria's phosphate dehydrogenate, make the sugar metabolism imbalance and kill the bacteria, 

b. the role of new ecological oxygen, by chlorophyll acid decomposition to form new ecological oxygen, the bacteria protein oxidation;

 

c. chlorination, through the combination of chlorine and membrane proteins, the formation of nitrogen and chlorine compounds, thereby interfering with cell metabolism, and finally cause the death of bacteria.

 

  1. main advantages and disadvantages:

 

Advantages:

  1. Wide bactericidal spectrum, rapid action, reliable bactericidal effect;

 

b. low toxicity;

 

  1. Easy to use and low price.

 

Disadvantages:

 

  1. Unstable, effective chlorine is easy to lose;

 

  1. Bleach the fabric;

 

  1.  corrosive;

 

  1. subject to the influence of machine, pH, etc.

 

 

(3) bactericidal effect

 

It usually kills bacteria, viruses, fungal spores and bacterial buds.

 

(4) use method

 

Common disinfection and sterilization methods include soaking, wiping, spraying and dry powder disinfection.

 

  1. Soaking method: put the articles to be disinfected or sterilized into the container containing chlorine-containing disinfectant solution and cover them.

To sterilize the contaminated articles with bacterial propagators, soak them in disinfectant containing 200mg/L effective chlorine for more than 10 minutes;

For the disinfection of hepatitis virus and bacteriology tuberculosis contaminated articles, use disinfectant containing effective chlorine 2000mg/L to soak for more than 30 minutes;

For the disinfection of bacterial germ - contaminated articles, soak them in disinfectant containing 2000mg/L effective chlorine for 30 minutes.

 

  1. wipe method: for large items or other items that cannot be disinfected by soaking method with wipe method.

See immersion for the concentration and duration of the drugs used for disinfection.

  1. spray method: for the general contaminated surface, spray wine evenly with 1000mg/L disinfectant (wall: 200mL/m2;Cement floor: 350mL/m2, earth floor,1000mL/m2) for over 30 minutes;Disinfection of surfaces contaminated with hepatitis viruses and bacteriology tuberculosis by containing,

Effective chlorine 2000mg/L disinfectant spray wine (spray volume as before), action for more than 60 minutes.

 

  1. Dry powder detoxification method: to the excreta disinfection, with bleaching powder and other powder containing chlorine disinfectant according to the excreta 1/5 dosage into the excreta, after a little mixing, the effect of 2-6 hours, to the hospital sewage disinfection, with dry powder according to effective chlorine 50mg/L dosage into the sewage and stir evenly, the effect of 2 hours after discharge.

 

(5) factors affecting sterilization

 

 

  1. The general rule of D concentration and action time is that the higher the drug concentration, the longer the action time, the better the bactericidal effect.

However, when the concentration of bleaching powder and trivalent drugs increases, the pH value of the solution also rises, and sometimes it is necessary to prolong the action time to sterilize.

 

  1. The lower the pH value of pH, the stronger the bactericidal effect.

The bactericidal effect of chlorine-containing disinfectants mainly depends on the concentration of chlorophyll acid in the solution which is not decomposed. The lower the pH value of the solution is, the more chlorophyll acid is not decomposed.

 

  1. The increase in temperature can strengthen the bactericidal effect.

However, sodium hypochondria solution can not be heated, otherwise it will cause decomposition, so that the bactericidal effect is reduced;

 

  1. The presence of organic matter can deplete effective chlorine, affecting its bactericidal effect.

The effect on the low concentration of disinfectant was obvious.

Starch, fat and alcohol had little effect (methanol had synergistic effect on sodium hypochondria), but organic matter had little effect on sodium hydrochlorofluorocarbon.

 

  1.  reducing substances such as phosphates, ferrous salts, sulfides and amigo compounds can also reduce their bactericidal effects.

Attention should be paid to disinfection of sewage;

 

  1. The hardness of water is less than 400mg/L, which has little effect on its bactericidal effect.

 

(6) precautions for use

 

  1. Should be stored in a covered container and replaced in time;

 

  1. Do not use for sterilization of surgical instruments;

 

  1. When soaking disinfection, articles do not take too much water;

 

  1. Do not be used to be blood, pus, feces and other organic matter pollution surface disinfection.

Before disinfection, the surface adhesion of organic matter should be removed;

  1. Do not use it for sterilization of surgical sutures;

 

  1.  When disinfecting textiles with disinfectants containing chlorine, rinse them with clean water immediately after disinfection.
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Hypochlorites are widely used for disinfection, sanitization, and bleaching purposes in various industries. Among them, calcium hypochlorite and sodium hypochlorite are the most commonly used. Understanding the differences between these two compounds is crucial for selecting the appropriate chemical for specific applications. This article explores their properties, uses, advantages, and disadvantages. Chemical Composition and Physical Form Calcium Hypochlorite (Ca(ClO)₂): Chemical Composition: Calcium hypochlorite consists of calcium, chlorine, and oxygen. Physical Form: It is commonly available in granular or tablet form, with a white or grayish-white appearance. Concentration: Typically, calcium hypochlorite contains 65-70% available chlorine. Sodium Hypochlorite (NaOCl): Chemical Composition: Sodium hypochlorite consists of sodium, chlorine, and oxygen. Physical Form: It is usually found in liquid form, appearing as a clear, slightly yellow solution. Concentration: Commercial sodium hypochlorite solutions typically contain 10-15% available chlorine. Solubility and Stability Calcium Hypochlorite: Solubility: Calcium hypochlorite is less soluble in water compared to sodium hypochlorite. It requires thorough mixing to dissolve completely. Stability: It is relatively stable when stored in a dry and cool environment but can degrade over time when exposed to heat, moisture, or air. Sodium Hypochlorite: Solubility: Sodium hypochlorite is highly soluble in water, making it easy to use in various aqueous solutions. Stability: It is less stable than calcium hypochlorite and can degrade more rapidly, especially when exposed to light, heat, or contaminants. Sodium hypochlorite solutions should be stored in a cool, dark place to maintain their effectiveness. Applications Calcium Hypochlorite: Water Treatment: Commonly used for disinfecting drinking water and swimming pools due to its high chlorine content and ease of handling in solid form. Sanitization: Used in food processing plants, dairies, and other industries for sanitizing equipment and surfaces. Bleaching: Employed in the textile and paper industries for bleaching fabrics and paper products. Sodium Hypochlorite: Water Treatment: Widely used for disinfecting municipal drinking water and wastewater due to its easy solubility and application in liquid form. Household Cleaning: Found in household bleach and various cleaning products for sanitizing surfaces, removing stains, and disinfecting. Industrial Cleaning: Used in industries for cleaning and disinfecting surfaces, equipment, and containers. Advantages and Disadvantages Calcium Hypochlorite: Advantages: Higher available chlorine content provides strong disinfection power. Solid form offers longer shelf life and easier storage. Less corrosive compared to liquid hypochlorites. Disadvantages: Requires careful handling and storage to prevent degradation. Less soluble, requiring thorough mixing in water. Potentially hazardous if not handled properly. Sodium Hypochlorite: Advantages: Highly soluble in water, making it easy to use in various solutions. Convenient for large-scale disinfection and cleaning due to its liquid form. Commonly available and easy to use in household and industrial applications. Disadvantages: Lower chlorine content compared to calcium hypochlorite. Less stable, with a shorter shelf life and potential for rapid degradation. More corrosive, requiring careful handling and storage. Environmental Impact Both calcium hypochlorite and sodium hypochlorite can have significant environmental impacts if not used and disposed of properly. They can contribute to chlorine residuals in water bodies, which can be harmful to aquatic life. Proper handling, storage, and disposal procedures are essential to minimize their environmental footprint. Conclusion Calcium hypochlorite and sodium hypochlorite are both effective disinfectants with their own sets of advantages and disadvantages. Calcium hypochlorite's higher chlorine content and solid form make it suitable for certain applications, while sodium hypochlorite's solubility and ease of use in liquid form make it ideal for others. Understanding the differences between these two chemicals helps in selecting the appropriate hypochlorite for specific needs, ensuring effective disinfection while considering handling, stability, and environmental impact.
See more information
Hypochlorites are widely used for disinfection, sanitization, and bleaching purposes in various industries. Among them, calcium hypochlorite and sodium hypochlorite are the most commonly used. Understanding the differences between these two compounds is crucial for selecting the appropriate chemical for specific applications. This article explores their properties, uses, advantages, and disadvantages. Chemical Composition and Physical Form Calcium Hypochlorite (Ca(ClO)₂): Chemical Composition: Calcium hypochlorite consists of calcium, chlorine, and oxygen. Physical Form: It is commonly available in granular or tablet form, with a white or grayish-white appearance. Concentration: Typically, calcium hypochlorite contains 65-70% available chlorine. Sodium Hypochlorite (NaOCl): Chemical Composition: Sodium hypochlorite consists of sodium, chlorine, and oxygen. Physical Form: It is usually found in liquid form, appearing as a clear, slightly yellow solution. Concentration: Commercial sodium hypochlorite solutions typically contain 10-15% available chlorine. Solubility and Stability Calcium Hypochlorite: Solubility: Calcium hypochlorite is less soluble in water compared to sodium hypochlorite. It requires thorough mixing to dissolve completely. Stability: It is relatively stable when stored in a dry and cool environment but can degrade over time when exposed to heat, moisture, or air. Sodium Hypochlorite: Solubility: Sodium hypochlorite is highly soluble in water, making it easy to use in various aqueous solutions. Stability: It is less stable than calcium hypochlorite and can degrade more rapidly, especially when exposed to light, heat, or contaminants. Sodium hypochlorite solutions should be stored in a cool, dark place to maintain their effectiveness. Applications Calcium Hypochlorite: Water Treatment: Commonly used for disinfecting drinking water and swimming pools due to its high chlorine content and ease of handling in solid form. Sanitization: Used in food processing plants, dairies, and other industries for sanitizing equipment and surfaces. Bleaching: Employed in the textile and paper industries for bleaching fabrics and paper products. Sodium Hypochlorite: Water Treatment: Widely used for disinfecting municipal drinking water and wastewater due to its easy solubility and application in liquid form. Household Cleaning: Found in household bleach and various cleaning products for sanitizing surfaces, removing stains, and disinfecting. Industrial Cleaning: Used in industries for cleaning and disinfecting surfaces, equipment, and containers. Advantages and Disadvantages Calcium Hypochlorite: Advantages: Higher available chlorine content provides strong disinfection power. Solid form offers longer shelf life and easier storage. Less corrosive compared to liquid hypochlorites. Disadvantages: Requires careful handling and storage to prevent degradation. Less soluble, requiring thorough mixing in water. Potentially hazardous if not handled properly. Sodium Hypochlorite: Advantages: Highly soluble in water, making it easy to use in various solutions. Convenient for large-scale disinfection and cleaning due to its liquid form. Commonly available and easy to use in household and industrial applications. Disadvantages: Lower chlorine content compared to calcium hypochlorite. Less stable, with a shorter shelf life and potential for rapid degradation. More corrosive, requiring careful handling and storage. Environmental Impact Both calcium hypochlorite and sodium hypochlorite can have significant environmental impacts if not used and disposed of properly. They can contribute to chlorine residuals in water bodies, which can be harmful to aquatic life. Proper handling, storage, and disposal procedures are essential to minimize their environmental footprint. Conclusion Calcium hypochlorite and sodium hypochlorite are both effective disinfectants with their own sets of advantages and disadvantages. Calcium hypochlorite's higher chlorine content and solid form make it suitable for certain applications, while sodium hypochlorite's solubility and ease of use in liquid form make it ideal for others. Understanding the differences between these two chemicals helps in selecting the appropriate hypochlorite for specific needs, ensuring effective disinfection while considering handling, stability, and environmental impact.
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