Why Is 70 Alcohol A Better Disinfectant Than 95 Alcohol

Why Is 70% Alcohol A Better Disinfectant Than 95% Alcohol?

Posted on : 08/18/21 Posted by :

As the pandemic of the Corona Virus is spreading, it is essential that everyone stays safe, healthy, and protected. People are advised to stock up hand sanitizers, face masks, gloves, and disinfectants to prevent the spread of Covid-19. Disinfectants and hand sanitizers are manufactured using Isopropyl Alcohol and are widely used in hospitals, pharmaceuticals, and clean rooms. One of the major misconceptions is that hands can be cleaned better with disinfectants having a higher percentage of alcohol. There are many concentrations of alcohol disinfectants available, and read on to know why 70 alcohol is a better disinfectant than 95 alcohol.

What Is Isopropyl Alcohol?

Isopropyl Alcohol or IPA is the most used disinfectant in hospitals and most cleaning applications. Different solutions, concentrations, and purity grades of alcohol should be appropriately used based on the application. Improper usage of alcohol can lead to dangerous consequences.

Does Alcohol Kill Germs?

Alcohol affects the fat membranes of bacteria and virus cells, and these cells dissolve in alcohol. The killing of germs using alcohol is referred to as denaturation. However, for the process to be effective the 60 to 90 percent of alcohol is to be used and is approved by CDC (Centre for Disease Control and Prevention).

Why Is 70% Alcohol A Better Disinfectant Than 95% Alcohol?

In contrast to most people’s misconception, the higher the alcohol concentration, the less effective it is in killing germs. Using high concentrated alcohol leads to immediate coagulation of cell wall proteins of bacteria and thus prevents the passage of alcohol into the cell. When the outer layer is solidified, the bacteria is safe from alcohol, and thus stronger IPA is protecting the germs rather than killing them.

On the other side, 70% Isopropyl alcohol is more effective over the cell membrane of bacteria and thereby attacking bacteria directly. Furthermore, 99% isopropanol evaporates very quickly, which does not allow it to penetrate cell walls and kill bacteria, and therefore isn’t as good for disinfecting surfaces. In other words, it breaks down the outside of the cell before it can penetrate the pathogen.

The percentage or presence of water in alcohol also plays a vital role in preventing or killing bacteria. Water acts as a catalyst and plays a key role in denaturing the proteins of vegetative cell membranes.70% alcohol penetrates the cell wall more completely, permeating the entire cell, coagulating all proteins, and therefore the microorganism dies.

Benefits Of Using 70% Alcohol

  • The slow pace of the coagulation process and thereby allowing to enter the membrane of bacteria
  • 70% of alcohol contains water, which helps the process of denaturing
  • Water concentration helps alcohol penetrate more easily as 70% alcohol enters the cell to denature enzymatic and structural proteins.
  • CDC recommends 70% alcohol for disinfecting household and cleaning

Where To Buy Alcohol-Based Sanitizers?

It is important to use the correct concentration of alcohol for the disinfection of households and hands. In the wake of the Corona Virus, one should keep stock of sanitizers, disinfectants, and masks for their safety. Protech Safety Supply is the supplier of hand sanitizers all over Canada and North America. Contact us for more details.

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