Crystal IS, an Asahi Kasei company, and Boston University’s National Emerging Infectious Diseases Laboratories (NEIDL) have performed research demonstrating the efficacy of Crystal IS’ Klaran UVC LEDs to inactivate SARS-CoV-2.
Crystal IS initiated this research to understand how SARS-CoV-2, the virus which causes COVID-19, responds to ultraviolet light across the emission range of Klaran UVC LEDs (260 nm to 270 nm) and at different doses.
“The research by NEIDL at Boston University demonstrates that SARS-CoV-2 can be effectively inactivated in a matter of seconds through exposure to low doses of UVC light in the key germicidal range.”
Log Reduction as a Function of Dose and LED Peak Wavelength
Log Reduction = Bold
|1.25 mJ/cm2||2.5 mJ/cm2||3.75 mJ/cm2||5 mJ/cm2|
|1 second||2 seconds||3 seconds||4 seconds|
Data courtesy of Dr. Anthony Griffiths, NEIDL, Boston University
Impact of Wavelength on Log Reduction
Log Reduction = Bold
|3.75 mJ/cm2||5 mJ/cm2||37 mJ/cm2|
1 Hiroko Inagaki, Akatsuki Saito, Hironobu Sugiyama, Tamaki Okabayashi, & Shouichi Fujimoto (2020), Rapid Inactivation of SARS-CoV-2 with deep-UV LED irradiation. https://www.tandfonline.com/doi/full/10.1080/22221751.2020.1796529
“The research by NEIDL at Boston University demonstrates that SARS-CoV-2 can be effectively inactivated in a matter of seconds through exposure to low doses of UVC light in the key germicidal range” said Larry Felton, President at Crystal IS. However, comparing test results from this study against published results from the University of Miyazaki (which used UVC LEDs emitting at 280 nm) highlights a marked drop in efficacy beyond 270 nm wavelength. While there is much to be done in the fight against the coronavirus pandemic, Crystal IS believes this type of data can be used to help design innovative and effective disinfection solutions.
Klaran UVC LEDs are currently being used by a number of partners, including Healthe AirTM by Healthe, Inc., and Big Ass Fans Clean Air System Haiku with UV-C, which provides continuous disinfection and clean airflow in retail, restaurant, fitness and office settings.
To learn more about Klaran UVC LEDs visit klaran.com.