June 16, 2008

Rentech Energy Midwest Corporation Secures $53 Million in Total Debt Financing

Rentech, Inc. (AMEX:RTK) today announced that its ammonia fertilizer facility, Rentech Energy Midwest Corporation ("REMC"), recently secured $53 million in total debt financing.

REMC entered into a credit agreement for $26.5 million with a unit of Credit Suisse on May 30, 2008. The credit agreement was increased to $53 million on June 13, 2008. The loans have a two-year term, with an optional one-year extension. The net proceeds of the term loans are available to Rentech and will be used for general corporate purposes. The loans are expected to be repaid over the term from cash flows generated at REMC.

"We are pleased to have enhanced our liquidity position through this debt financing, which is made possible by the financial performance of our ammonia fertilizer facility," said Merrick Kerr, Executive Vice President and Chief Financial Officer of Rentech.

Rentech continues to see strong demand and favorable market prices for the fertilizer products produced at REMC. The Company is reaffirming its prior financial guidance of projected fiscal year 2008 EBITDA for REMC of over $40 million. REMC's strong financial performance provides cash flows that help support Rentech's efforts to commercialize its technology.

The Company's commercialization plans for the Rentech Process include the Rentech Strategic Fuels and Chemicals Center in Adams County, Mississippi, near the city of Natchez. The facility is expected to use primarily petroleum coke as gasification feedstock to produce ultra-clean synthetic fuels, specialty waxes and chemicals. The captured carbon dioxide produced at this plant is designated to be sold under an existing long-term agreement with Denbury Resources for enhanced oil recovery in the region. With the carbon capture and sequestration design, the carbon dioxide emissions from the production of fuels at the Natchez facility are expected to be lower than those generated in the production of traditional petroleum-derived fuels.

Rentech has completed construction of a fully-integrated 420 gallon per day synthetic fuel and chemicals facility in Commerce City, Colorado. First fuel production at this facility is expected around the end of June upon the successful commissioning and start-up of all equipment and processes, at which time it is expected to be the only operating synthetic fuels facility of its kind in the United States.

About Rentech, Inc.

Rentech, Inc. (www.rentechinc.com), incorporated in 1981, provides clean energy solutions. The Rentech Process is a patented and proprietary technology that converts synthesis gas from biomass and fossil resources into hydrocarbons that can be processed and upgraded into ultra-clean synthetic fuels, specialty waxes and chemicals. These energy resources include natural gas, biomass, municipal solid waste, petroleum coke and coal. Rentech Energy Midwest Corporation manufactures and sells fertilizer products including ammonia, urea ammonia nitrate, urea granule and urea solution to the corn-belt region.

Safe Harbor

This press release contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995 about matters such as the timing of fuel production at the Company's facility in Colorado, sources of funds for the repayment of the term loans, commercialization plans for the Company's technology and the projected financial performance at Rentech Energy Midwest Corporation. These statements are based on management's current expectations and actual results may differ materially as a result of various risks and uncertainties. Other factors that could cause actual results to differ from those reflected in the forward-looking statements include the Company's ability to raise additional amounts of capital in order to fund the design, engineering and construction of the Natchez facility or other commercial scale synthetic fuels facilities and other factors set forth in the Company's press releases and periodic public filings with the Securities and Exchange Commission, which are available via Rentech's web site at www.rentechinc.com. The forward-looking statements in this press release are made as of the date of this release, and Rentech does not undertake to revise or update these forward-looking statements, except to the extent that it is required to do so under applicable law.

Disclosure Regarding Non-GAAP Financial Measures

EBITDA is a presentation of "earnings before interest, taxes, depreciation and amortization." Management believes that Non-GAAP EBITDA is a useful measure of financial performance that can help investors more meaningfully evaluate our liquidity position by the elimination of non-cash related items such as depreciation and amortization. We believe that our investor base regularly uses EBITDA as a measure of the liquidity of our business. Our management uses EBITDA from the Company's fertilizer production facility, Rentech Energy Midwest Corporation, as a supplement to cash flow from operations as a way to assess the cash generated from our principal operating asset available for working capital and funding our commercialization efforts. However, we recommend that investors carefully review the GAAP financial information included as part of our Quarterly Reports on Form 10-Q, our Annual Reports on Form 10-K, and our quarterly earnings releases, and compare GAAP financial information with the non-GAAP financial results disclosed in our quarterly earnings releases and investor calls. The principal adjustment to derive projected EBITDA from segment operating income for REMC determined under GAAP is depreciation and amortization presently estimated to be $9.2 million for the 2008 fiscal year.

For more information

For more information please contact: Julie Dawoodjee, Director of Investor Relations, Rentech, Inc. at 310-571-9800, extension 341 or by email at [email protected]