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Six factors affecting the effectiveness of disinfectants

Carrie Aug 12,2019 Share this post:

Disinfectants are used to kill pathogenic microorganisms on the vector, so that they can meet the requirements of harmlessness, cut off the transmission route of infectious diseases, and achieve the purpose of controlling infectious diseases. There are many factors that affect the effectiveness of disinfectants, mainly the following six points.


plastic disinfectant bottle


1. The concentration and duration of disinfectant, each chemical disinfectant has a specific effective anti-virus concentration, and the concentration is too low or too high can affect the sterilization effect. Such as chlorine-containing disinfectant, the higher the concentration in a certain range, the stronger the sterilization effect; while the ethanol has the best sterilization effect only when it is 70%~75%. The longer the action time, the higher the microbial kill rate.

2. Temperature and relative humidity: Within a certain range, the higher the temperature of the disinfectant, the stronger the bactericidal power; the bactericidal effect of some anti-virus agents is best under the appropriate humidity.

3. Types and quantities of contaminated microorganisms: The more serious the pollution, the more difficult it is to disinfect.

4. pH: Some chemical disinfectants only have the best bactericidal effect in the corresponding pH range.

5. Antagonists: Some disinfectants should be avoided with antagonists because they contain ionic surface active substances.

6. Organic matter: The presence of organic matter can hinder the penetration of the disinfectant and reduce its bactericidal effect.


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