The reason UVC light works as a disinfectant is that direct exposure to UVC light ruptures the DNA or RNA of bacteria, viruses and other germs and makes them unable to multiply and cause an infection. This technology works by line of sight, so the light must reach a surface in order for bacteria or viruses to be deactivated.

UVC light initiates a reaction between two molecules of thymine, one of the bases that make up DNA (in RNA thymine is replaced with uracil). If the damage is extensive the DNA/RNA sequence is altered, which prevents the pathogen from reproducing. Thymine and uracil are especially sensitive at wavelengths at or near 265 nm. At wavelengths longer than 300 nm, there is almost no absorption. 

It has also been shown that polychromatic light, which means light with a broader UVC spectrum, is more effective at inactivating certain pathogens than light sources that emit monochromatic light at 265 nm. A broader spectrum means that the light damages other cellular and viral components than nucleic acids inducing even greater damage to the pathogen and preventing any regrowth.

If you have any questions or would like more information about UV technology in general or PureFize® in particular, please contact us.