Rentech Nitrogen Partners, L.P. Announces Closing of Initial Public Offering of Common Units

Rentech Nitrogen Partners, L.P. (Rentech Nitrogen) announced today the closing of its initial public offering of 15,000,000 common units representing limited partner interests at $20.00 per common unit. The common units are listed on the New York Stock Exchange under the ticker symbol “RNF.”

Rentech, Inc. (NYSE AMEX: RTK) now indirectly owns approximately 60.8% of the outstanding common units of Rentech Nitrogen and 100% of the non-economic general partner interest in Rentech Nitrogen.

The underwriters of the initial public offering have been granted an option to purchase up to 2,250,000 additional common units at the public offering price for a period of 30 days after November 3, 2011.

Morgan Stanley & Co. LLC and Credit Suisse Securities (USA) LLC acted as joint book-running managers of the offering. Citigroup Global Markets Inc.; RBC Capital Markets, LLC; Imperial Capital, LLC; Brean Murray, Carret & Co., LLC; Dahlman Rose & Company, LLC; and Chardan Capital Markets, LLC acted as co-managers.

A copy of the final prospectus relating to the offering may be obtained from the offices of:

Morgan Stanley & Co. LLC.180 Varick Street, 2nd FloorNew York, New York 10014Attn: Prospectus DepartmentEmail: [e-mail]: [phone]

Credit Suisse Securities (USA) LLCOne Madison AvenueNew York, New York 10010Attn: Prospectus DepartmentTelephone: [phone]

A registration statement relating to the common units has been filed with, and declared effective by, the Securities and Exchange Commission. This press release shall not constitute an offer to sell or the solicitation of an offer to buy the common units, nor shall there be any sale of the common units in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state.

About Rentech Nitrogen Partners, L.P.

Rentech Nitrogen was formed by Rentech, Inc. to own, operate and expand its nitrogen fertilizer business. Rentech Nitrogen’s assets consist of a nitrogen fertilizer facility located in East Dubuque, Illinois, owned by Rentech Nitrogen, LLC. The facility is located in the Mid Corn Belt in the northwestern corner of Illinois, adjacent to the Iowa and Wisconsin state lines, and produces primarily anhydrous ammonia and urea ammonium nitrate solution, using natural gas as its primary feedstock, for sale to customers in the Mid Corn Belt.