IDAHO FALLS, Idaho, June 4 /PRNewswire-FirstCall/ -- International
Isotopes Inc. (OTC Bulletin Board: INIS) is pleased to announce plans to
construct a commercial facility to process depleted uranium hexafluoride (UF6)
tails from commercial uranium enrichment operations.

The facility will use INIS's patented Fluorine Extraction Process (FEP)
technology to convert the tails into readily disposable forms and in the
process produce high-value specialty fluoride gases for use in the fabrication
of microelectronics and in other applications. By using enrichment plant
tails to generate valuable products, INIS's plant will offer a near-term,
economical, and environmentally friendly solution for commercial depleted UF6
management.

During the uranium enrichment process, uranium in the form of UF6 is
enriched in the isotope U-235 to produce nuclear fuel. Approximately 90% of
the UF6 that goes into the enrichment facility becomes "depleted" and emerges
as UF6 "tails". By volume, depleted UF6 from the enrichment process is the
largest waste component of the entire nuclear fuel cycle. Depleted UF6 cannot
be disposed of directly, but must be converted into disposable waste forms.
There are no facilities in the U.S. today that can convert depleted UF6 tails.
The Company's facility will fill an important need facing commercial uranium
enrichment providers.

USEC, Louisiana Energy Services (LES), AREVA, and General Electric have
all either announced plans to build, or are building, new nuclear fuel
enrichment facilities in the United States. If and when these facilities are
completed, at their initial stated capacity, they will produce approximately
60 million pounds of depleted UF6 tails each year.

INIS's facility will employ a two-step conversion process. The first step
involves the conversion of UF6 to UF4 using equipment the Company recently
acquired. The UF4 will then be used as the raw material for the second step,
which employs the Company's patented FEP technology. International Isotopes'
Fluorine Products Division (FPD) acquired seven patents for the FEP in January
2004, and since late 2006 has been using the technology in a pilot plant to
produce high purity germanium tetrafluoride. FEP "mines" the depleted UF4 by
separating the fluorine from the uranium. The outputs of the planned facility
will be significant volumes of high purity, high value fluoride gases and
uranium oxide - which can be readily disposed as low-level waste. Depleted UF6
conversion, using the Company's patented FEP technology, is the most
environmentally friendly and only economic solution for depleted UF6 tails.
Since UF4 is the feed material for the FEP, the Company plans to develop a
"for fee" de-conversion service for commercial fuel-enrichment companies to
convert their depleted UF6 into UF4 and then use the UF4 from that process to
run FEP and produce several high purity fluoride gases. This will provide the
enrichment companies and the nuclear industry with a complete depleted UF6
solution. The enrichment firms will be relieved of the costs of constructing
their own de-conversion facilities, management and storage costs of depleted
UF6 cylinders, cost of stabilizing UF6, and much of the transportation
requirements as well. At the same time, the Company believes its conversion
facility will provide a more acceptable solution for the environment,
communities, and governments. INIS believes using this method of uranium
processing together with FEP is a very "green" solution to the disposal of
this form of uranium.

Steve T. Laflin, President and Chief Executive Officer of INIS, stated,
"This announcement today marks the culmination of over three years of
development work and is a major step in our new, strategic business plan and
our intent to become the nation's first, and only, commercial provider of UF6
depleted uranium processing. I believe we have the infrastructure in place to
fully execute this business opportunity.

"Since 2006, we have been constructing and scaling up operations in our
FEP pilot plant located outside Idaho Falls, ID for production of germanium
tetrafluoride, a product being used for cutting edge development of certain
microelectronics applications useful to the wireless industry. Our plant is
now running on a continual basis and is in the process of completing initial
customer product qualifications. The initial development work completed in the
plant will support design of the FEP component within the larger uranium
conversion plant.

"This production process is an excellent example of environmentally sound
recycling. We will be chemically stabilizing depleted uranium tails into a
safer form and reducing its volume while at the same time recovering products
that are required to manufacture everything from computer chips to cell
phones.

"The Company plans to begin hiring personnel and put subcontracts in place
to carry out engineering design, licensing, site studies, and environmental
reviews. The Company submitted a letter of intent to the U.S. Nuclear
Regulatory Commission in March 2008, informing them of the Company's intent to
begin submitting license applications in early 2009. The location of the new
facility has not yet been determined.

"The Company will narrow its search for suitable locations in the coming
weeks and months as part of our site location review process. International
Isotopes estimates about 100 people will be required for construction and the
plant would eventually have 30-50 full time employees.

"International Isotopes has an excellent history of safe operations,
having been only the seventh business in Idaho to have received OSHA's SHARP
award - OSHA's most significant safety award for small business.

"We will continue our strong emphasis on safety with this new facility.
International Isotopes is keenly sensitive to environmental issues and is
committed to being a safe, clean, green, and welcomed addition to the
community in what ever location we eventually choose for this new
opportunity," concluded Laflin.

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.