IDAHO FALLS, Idaho, June 4 /PRNewswire-FirstCall/ -- International
Isotopes Inc. (OTC Bulletin Board: INIS) is pleased to announce it has filed
five domestic and international patent applications for its promising
fluorination technology.

During 2007 and 2008, INIS's Fluorine Products Division evaluated the
feasibility of using germanium tetrafluoride and silicon tetrafluoride as
fluorinating agents for the production of organo-fluorine products. In a
series of small-scale experiments, it successfully demonstrated that both
germanium tetrafluoride and silicon tetrafluoride could be used as
fluorinating agents for the direct production of certain hydro fluorocarbons.
The Company believes this technology could have beneficial applications for
the production of certain pharmaceutical compounds, agro chemicals, and
certain fluorinated olefins. INIS would like to stress this technology is in
very early development and more research needs to be done to demonstrate true
commercial applications.

Steve T. Laflin President and Chief Executive Officer of INIS stated, "We
are very pleased with the initial early results from this promising
fluorination technology and believe these experiments represent a significant
advance in organo-fluorine chemistry. This technology potentially fits in very
well with our announcement today of our planned large-scale uranium
de-conversion and fluorine extraction facility. We expect that facility will
produce large volumes of fluoride gases such as SiF4.

"Since the feedstock material for this fluorine gas production is a waste
material, we believe our production costs will be competitive with current
fluoride gas manufacturing processes. We plan to continue research into
developing these fluorination technologies with an ultimate goal of expanding
the markets for the high purity fluoride gases we produce using our patented
Fluorine Extraction Process. Current uses for these high purity gases include
microelectronics applications, fiber optic cable manufacturing, and production
of photovoltaic films for various solar cell applications.

"I do want to stress these developments are at a very early stage but
obviously, if successful, it would increase the markets for our fluoride
gases."

About International Isotopes Inc.

International Isotopes Inc. manufactures a full range of nuclear medicine
calibration and reference standards, high purity fluoride gases, and a variety
of cobalt-60 products such as teletherapy sources. The Company also provides
a wide selection of radioisotopes and radiochemicals for medical devices,
calibration, clinical research, life sciences, and industrial applications and
provides a host of analytical, measurement, recycling, and processing services
on a contract basis to clients.

International Isotopes Inc. Safe Harbor Statement

Forward-looking statements in this press release are made pursuant to the
safe harbor provision of the federal securities laws. Information contained
in forward-looking statements is based on current expectations and is subject
to change. Actual results may differ materially from the forward-looking
statements. Many factors could cause actual results to differ materially from
the forward-looking statements. Readers are directed to read the risk factors
detailed from time to time in our filings with the Securities and Exchange
Commission, including our annual report on Form 10-KSB for the year ending
December 31, 2006. The Company does not intend to publicly release any
revisions to these forward-looking statements to reflect events or
circumstances after the date hereof or to reflect the occurrence of
unanticipated events.

SOURCE International Isotopes Inc.