TSO3: Conference Call and Webcast - Financial Results for Q1 2008

May 5, 2008

Québec City, Canada, May 5, 2008 – TSO3 Inc. (“TSO3”) (TSX: TOS) today announced that it will report financial results for the first quarter 2008 ended March 31, 2008, on Thursday, Mai 8, 2008.

TSO3 will host a Conference Call at 12:00 P.M. (ET), on May 8, 2008. Analysts and institutional investors are invited to participate. The numbers to dial for access are (514) 807-8791 (Montréal area), (416) 915 5763 (Toronto area) or the toll-free number 1-866-250-4892.

Other Interested parties may listen to the live Webcast of the Conference Call accessible via TSO3’s Website at: www.tso3.com. The Webcast will be archived for 90 days.


About TSO3

TSO3, founded in Québec City in 1998, specializes in the research and development of innovative, high-performance medical instrument sterilization technology whit high commercial potential. The Company’s first product, the 125L Ozone Sterilizer, is designed for sterile processing centers in the hospital environment.

In contrast to other methods used, the ozone sterilization process developed and patented by TSO3 meets all standards required by the evolution in sterilization needs, which are: significant costs savings, increased safety for patients and hospital staff, and a “green” environmentally safe process. The Company believes that its technology represents an advantageous replacement solution to other low temperature sterilization processes currently used in hospitals.

The 125L Ozone Sterilizer is cleared for commercialization by the US Food and Drug Administration and by Health Canada. TSO3 is in commercialization phase for this first product since 2006.

TSO3 currently has more than 72 employees, about half of whom work in the sales and marketing team.

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Source: TSO3 Inc.

Information:
Caroline Côté
Director, Corporate Communications & IR
(418) 651-0003, Ext. 237
Email: ccote@tso3.com
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