Surface Sanitization: UV-C Light vs Chemicals

Microorganisms are present everywhere in our environment. Some of them are harmless and but some of them are harmful to our life. These harmful infecting microorganisms when present on a surface, makes it contaminated. These contaminated surfaces can be anything – rooms, equipment in a hospital, living rooms, showrooms, shopping malls, airports, and virtually in any public place. In this current situation of the COVID-19 outbreak, everyone is making efforts to get these microorganisms eliminated from every contactable surface. Normal cleaning of the surfaces may work to some extent only but there is always some risk of inevitable residual contamination.


Disinfection, also known as ‘sanitization’ is a process of reduction in a number of viable microorganisms, it is different from sterilization which is the process of killing all the microorganisms present on any of the surfaces of the object that are being sterilized. Sterilization is carried over by heat or certain harsh chemicals and usually is done with medical equipment that is to be entered in living tissues or fluids.

Sanitization procedure is carried by different chemical agents usually, and for this many different products are available in the market but this makes it confusing too as there are many options available. The procedure of this chemical sanitization is also technically sensitive as the treatment through chemicals correctly and consistently done. Ultraviolet Germicidal Irradiation (UVGI) is also a sanitization method that is used to inactivate the microorganisms by destructing the DNA/RNA and thus making them unable to replicate and cause further infection.

UV-C Light:

The use of ultraviolet light in the form of germicidal mercury lamps is being used and proven for the last 100 years as an effective part of high-level disinfection protocols. The physical UV-C sanitization method is a good alternative to hazardous chemicals that are being traditionally used and is also proven better due to an increase in chemical resistant microorganism strains and emission of harmful by-products by the use of chemical sanitizers. The sanitization by UV-C light does not produce any by-product and also does not generates any of the toxin or volatile gas that is dangerous.

UV-C disinfection can be easily achieved by using the 250-280nm wavelength of light radiation which inactivates the pathogenic microorganism by penetrating the cell wall and destroying the genetic material (DNA/RNA), thus their survival and reproduction are affected. Low-pressure mercury vapor UV-C tube lamps have a strong emission line of light at 253.7nm, which is at the wavelength that strongly causes sanitization by the elimination of maximum strains of microorganisms. This kind of UV-C disinfectant is also available in the market in the form of UV-Chamber.


Thus the UV-C light surface disinfection is much helpful in achieving the surface sanitization of the objects at home, hospitals, clinics, offices, malls, shops, and even in schools and colleges too. These devices are easy to transport as compared to hazardous chemicals and can easily provide low to a high level of disinfection qualities as per the need. The other advantages include-

  • Proven maintenance-free germicidal protection against a wide range of microorganisms.
  • Portable and compact size to carry over places
  • Consistent, cost-effective, and good hygiene compliance.


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