TSO3 to hold Annual and Special Meeting of Shareholders May 1, 2008

April 23, 2008

Quebec City, April 23, 2008 – TSO3 Inc. (“TSO3”) (TSX: TOS) will hold its fiscal 2007 Annual and Special Meeting of Shareholders on Thursday, May 1, 2008. The meeting will be held at the Musée National des Beaux-Arts du Québec, Salon Paul-Rainville, 1st avenue Wolfe-Montcalm, Quebec City at 10:30 A.M. (ET). For those who are unable to attend in person, a webcast of the meeting and management presentation will be accessible from TSO3's website at www.tso3.com.

On this occasion, Mr. Jocelyn Vézina, CEO of TSO3 and the other management team members, will provide an update on the current situation, as well as on development projects.


About TSO3

TSO3, founded in Quebec City in 1998, specializes in the research and development of innovative, high-performance medical instrument sterilization technology with 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 has been in the 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.

The statements in this release and oral statements made by representatives of TSO3 relating to matters that are not historical facts (including, without limitation, those regarding the timing or outcome of any financing undertaken by TSO3) are forward-looking statements that involve certain risks, uncertainties and hypotheses, including, but not limited to, general business and economic conditions, the condition of the financial markets, the ability of TSO3 to obtain financing on favourable terms and other risks and uncertainties.

The TSX has neither approved nor disapproved the information contained herein and accepts no responsibility for it.

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Source: TSO3 Inc.

Information:
Caroline Côté
Director, Corporate Communications & IR
(418) 651-0003, Ext. 237
Email: ccote@tso3.com
© 2005-2008 TSO3. All Rights Reserved.