The hydroxyl radicals are highly reactive and excellent radical transfer agents.


Atmospheric hydroxyls rapidly react with microorganisms and with nearly every organic chemical available. They remove a hydrogen atom and form a cascade of organic radicals that is further oxidized to form peroxy (R-CO-O·) and oxy (R-C-O·) free radicals, which are also good oxidizing and sanitizing agents. These byproducts are stable enough to circulate under the influence of high velocity fans to completely sanitize air, surfaces and porous fabrics in even exceptionally large spaces. This process and technology has been approved by the FDA and Health Canada.


FDA Approval of Hydroxyl for Medical Use

HGI Industries, Inc., announced today the FDA approval of the mr natural®MDU/Rx air purifier for use in medical facilities.

The mr natural® MDU/Rx medical model is an ultraviolet (UV) air purifying device intended for the reduction of bacteria and selected virus in air in medical facilities. Performance data published in the FDA 510(k) summary showed 4 to 5 log reductions in airborne bacteria and selected virus within 1 to 2 hours; a reduction that is equivalent to killing 99.999% of the microorganisms. The mr natural®MDU/Rx is designed to treat areas of approximately 130 to 500 square feet with 8 to 10 foot ceilings (approximately 1,200 to 5,000 cubic feet) and has been approved by the FDA for use in occupied spaces. The device was tested in ventilated and unventilated spaces that covered that range and the test data provided to the FDA indicated that:

  • No carbon monoxide was detected above baseline levels
  • No significant concentrations of volatile organic or inorganic oxidants were formed

Models can be integrated with heating, ventilation and air conditioning systems to treat over one million cubic feet and feature interactive real-time process controls that enable remote monitoring and control. Models meet UL 507 and CSA C22.2 Standards.

About HGI Industries, Inc.

HGI Industries is a private technology company specializing in the design, development and production of systems to cleanse, deodorize and sanitize air and surfaces using UV irradiation. The UV energy sanitizes air as it passes through the device and reacts with oxygen and water to generate a powerful sanitizing mixture of hydroxyl radicals and oxidants that circulate throughout the treated area. The process is the ultimate in “green” technology, since it imitates the way the Sun sanitizes our environment safely by constantly generating atmospheric hydroxyls and oxidants in nature. The company offers models for consumer use in homes and businesses and comprehensive, integrated solutions to corporate clients. HGI markets its systems in collaboration with distributers in the U.S., Canada, Latin America, Australia, Europe and Asia.

For more information about hydroxyls for medical use, contact mr naturalenvironmental group.