Rentech Nitrogen Partners, L.P. (NYSE: RNF) today announced the achievement of key milestones for the ammonium sulfate (AS) debottlenecking project at its Pasadena Facility. With the achievement of these milestones, the commissioning phase of the project is now complete. The plant now produces ammonium sulfate at an average instantaneous rate of 2,100 tons per day, the targeted rate for the project. The increased rate represents a 20% increase from the plant’s previous nameplate production capacity. In addition, on-stream rates and plant reliability have improved, and the quality of ammonium sulfate is the highest since the facility began AS production in 2011. John Diesch, President of Rentech Nitrogen, commented, “We are extremely pleased with the improved operating performance of the Pasadena Facility since the completion of the debottlenecking project. Importantly, we expect work completed during the debottlenecking project to drive lasting improvements in the plant’s operating performance, reliability, and product quality.” Mr. Diesch added, “We are seeing repeat customers after our first full year of production, and as a result of better liquidity in the domestic market, we are contracting sales at a faster pace compared to last year.” Safe Harbor Statement This press release contains forward-looking statements about matters such as rates of production, quality of product, and overall reliability of the Pasadena Facility, as well as the market for AS. 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 are set forth in the Partnership’s prior press releases and periodic public filings with the Securities and Exchange Commission, which are available via Rentech Nitrogen’s website at www.rentechnitrogen.com. The forward-looking statements in this press release are made as of the date of this press release and Rentech Nitrogen 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. About Rentech Nitrogen, L.P. Rentech Nitrogen ( www.rentechnitrogen.com) was formed by Rentech, Inc. to own, operate and expand its nitrogen fertilizer business. Rentech Nitrogen’s assets consist of two fertilizer production facilities owned by its operating subsidiaries. The East Dubuque Facility is located in the northwestern corner of Illinois, and uses natural gas as a feedstock to produce primarily anhydrous ammonia and UAN solution for sale to customers in the Mid Corn Belt. The Pasadena Facility is located in Pasadena, Texas, along the Houston Ship Channel, and uses ammonia and sulfur as feedstocks to produce ammonium sulfate and ammonium thiosulfate fertilizers, and sulfuric acid. Rentech Nitrogen is the largest producer of synthetic granulated ammonium sulfate fertilizer in North America, with sales in the United States and internationally.